marine biology#Lifeforms

{{main|Biological oceanography}}

File:BlueMarble-2001-2002.jpgs. Most of the Earth's surface is covered by ocean, which is the home to marine life. Oceans average nearly four kilometers in-depth and are fringed with coastlines that run for about 360,000 kilometres.{{cite journal |last=Charette |first=Matthew |author2=Smith, Walter H. F. |title=The volume of Earth's ocean |journal=Oceanography |year=2010 |volume=23 |issue=2 |pages=112–114 |doi=10.5670/oceanog.2010.51 |doi-access=free |hdl=1912/3862 |hdl-access=free }}[https://www.cia.gov/the-world-factbook/countries/world/ World] The World Factbook, CIA. Retrieved 13 January 2014.|alt=Two views of the ocean from space]]

Marine biology can be contrasted with biological oceanography. Marine life is a field of study both in marine biology and in biological oceanography. Biological oceanography is the study of how organisms affect and are affected by the physics, chemistry, and geology of the oceanographic system. Biological oceanography mostly focuses on the microorganisms within the ocean; looking at how they are affected by their environment and how that affects larger marine creatures and their ecosystem.Lalli, Carol M., and Timothy R. Parsons. "Introduction." Biological Oceanography: An Introduction. First Edition ed. Tarrytown, New York: Pergamon, 1993. 7–21. Print.

Biological oceanography is similar to marine biology, but it studies ocean life from a different perspective. Biological oceanography takes a bottom up approach in terms of the food web, while marine biology studies the ocean from a top down perspective. Biological oceanography mainly focuses on the ecosystem of the ocean with an emphasis on plankton: their diversity (morphology, nutritional sources, motility, and metabolism); their productivity and how that plays a role in the global carbon cycle; and their distribution (predation and life cycle).{{cite web|last=Menden-Deuer|first=Susanne|author-link1=Susanne Menden-Deuer|title=Course Info, OCG 561 Biological Oceanography|url=http://www.gso.uri.edu/ocg561/|access-date=2021-03-19|archive-date=2018-01-29|archive-url=https://web.archive.org/web/20180129094359/http://www.gso.uri.edu/ocg561/|url-status=dead}}{{cite book|last=Miller|first=Charles B.|title=Biological Oceanography|author2=Patricia A. Wheeler|publisher=John Wiley & Sons|year=2012|edition=Second|location=Chinchester, West Sussex}} Biological oceanography also investigates the role of microbes in food webs, and how humans impact the ecosystems in the oceans.{{cite journal |doi = 10.1007/BF02368334|title = From marine ecology to biological oceanography|year = 1995|last1 = Mills|first1 = Eric L.|journal = Helgoländer Meeresuntersuchungen|volume = 49|issue = 1–4|pages = 29–44|bibcode = 1995HM.....49...29M|url = https://rdcu.be/chiJn|s2cid = 22149101|doi-access = free}}

File:Callyspongia sp. (Tube sponge).jpgs provide marine habitats for tube sponges, which in turn become marine habitats for fish]]

{{Ocean habitat topics}}

{{main|Marine habitats}}

Marine habitats can be divided into coastal and open ocean habitats. Coastal habitats are found in the area that extends from the shoreline to the edge of the continental shelf. Most marine life is found in coastal habitats, even though the shelf area occupies only seven percent of the total ocean area. Open ocean habitats are found in the deep ocean beyond the edge of the continental shelf. Alternatively, marine habitats can be divided into pelagic and demersal habitats. Pelagic habitats are found near the surface or in the open water column, away from the bottom of the ocean and affected by ocean currents, while demersal habitats are near or on the bottom. Marine habitats can be modified by their inhabitants. Some marine organisms, like corals, kelp and sea grasses, are ecosystem engineers which reshape the marine environment to the point where they create further habitat for other organisms.

File:Tide pools in santa cruz.jpg and sea anemone]]

Intertidal zones, the areas that are close to the shore, are constantly being exposed and covered by the ocean's tides. A huge array of life can be found within this zone. Shore habitats span from the upper intertidal zones to the area where land vegetation takes prominence. It can be underwater anywhere from daily to very infrequently. Many species here are scavengers, living off of sea life that is washed up on the shore. Many land animals also make much use of the shore and intertidal habitats. A subgroup of organisms in this habitat bores and grinds exposed rock through the process of bioerosion.{{clear left}}

File:Urdaibai, Bizkaia, Euskal Herria.jpg

Estuaries are also near shore and influenced by the tides. An estuary is a partially enclosed coastal body of water with one or more rivers or streams flowing into it and with a free connection to the open sea.{{cite book |last=Pritchard |first=D. W. |year=1967 |chapter= What is an estuary: physical viewpoint |pages=3–5 |editor-first=G. H. |editor-last=Lauf |title= Estuaries |series=A.A.A.S. Publ. |volume=83 |location=Washington, DC }} Estuaries form a transition zone between freshwater river environments and saltwater maritime environments. They are subject both to marine influences—such as tides, waves, and the influx of saline water—and to riverine influences—such as flows of fresh water and sediment. The shifting flows of both sea water and fresh water provide high levels of nutrients both in the water column and in sediment, making estuaries among the most productive natural habitats in the world.{{cite book |last1=McLusky |first1=D. S. |last2=Elliott |first2=M. |year=2004 |title=The Estuarine Ecosystem: Ecology, Threats and Management |location=New York |publisher=Oxford University Press |isbn=978-0-19-852508-0 }}{{clear left}}

File:Maldivesfish2.jpgs form complex marine ecosystems with tremendous biodiversity.]]

{{Main|Coral reef}}

Reefs comprise some of the densest and most diverse habitats in the world. The best-known types of reefs are tropical coral reefs which exist in most tropical waters; however, reefs can also exist in cold water. Reefs are built up by corals and other calcium-depositing animals, usually on top of a rocky outcrop on the ocean floor. Reefs can also grow on other surfaces, which has made it possible to create artificial reefs. Coral reefs also support a huge community of life, including the corals themselves, their symbiotic zooxanthellae, tropical fish and many other organisms.

Much attention in marine biology is focused on coral reefs and the El Niño weather phenomenon. In 1998, coral reefs experienced the most severe mass bleaching events on record, when vast expanses of reefs across the world died because sea surface temperatures rose well above normal.NOAA (1998) Record-breaking coral bleaching occurred in tropics this year. National Oceanic and Atmospheric Administration, Press release (October 23, 1998).ICRS (1998) Statement on Global Coral Bleaching in 1997-1998. International Coral Reef Society, October 15, 1998. Some reefs are recovering, but scientists say that between 50% and 70% of the world's coral reefs are now endangered and predict that global warming could exacerbate this trend.Bryant, D., Burke, L., McManus, J., et al. (1998) "Reefs at risk: a map-based indicator of threats to the world's coral reefs". World Resources Institute, Washington, D.C.{{cite journal | last1=Goreau | first1=T. J. | year=1992 | title=Bleaching and Reef Community Change in Jamaica: 1951 - 1991 | journal=Am. Zool. | volume=32 | issue=6| pages=683–695 | doi=10.1093/icb/32.6.683| doi-access=free }}{{cite journal | last1=Sebens | first1=K. P. | year=1994 | title=Biodiversity of Coral Reefs: What are We Losing and Why? | journal=Am. Zool. | volume=34 | pages=115–133 | doi=10.1093/icb/34.1.115| doi-access=free }}Wilkinson, C. R., and Buddemeier, R. W. (1994) "Global Climate Change and Coral Reefs:Implications for People and Reefs". Report of the UNEP-IOC-ASPEI-IUCN Global Task Team on the Implications of Climate Change on Coral Reefs. IUCN, Gland, Switzerland.{{clear left}}

File:Representative ocean animal life.jpg exist on the surfaces and within the tissues and organs of the diverse life inhabiting the ocean, across all ocean habitats.Apprill, A. (2017)"Marine animal microbiomes: toward understanding host–microbiome interactions in a changing ocean". Frontiers in Marine Science, 4: 222. {{doi|10.3389/fmars.2017.00222}}. 50px Material was copied from this source, which is available under a [https://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International License].]]

File:Humpback stellwagen edit.jpg.]]

{{Main|Pelagic zone}}

The open ocean is relatively unproductive because of a lack of nutrients, yet because it is so vast, in total it produces the most primary productivity. The open ocean is separated into different zones, and the different zones each have different ecologies.{{Cite web|url=http://marinebio.org/oceans/open-ocean/|title=The Open Ocean - MarineBio.org|website=marinebio.org|access-date=2016-09-26}} Zones which vary according to their depth include the epipelagic, mesopelagic, bathypelagic, abyssopelagic, and hadopelagic zones. Zones which vary by the amount of light they receive include the photic and aphotic zones. Much of the aphotic zone's energy is supplied by the open ocean in the form of detritus.{{clear left}}

File:Deep sea chimaera.jpg. Its snout is covered with tiny pores capable of detecting animals by perturbations in electric fields.]]

The deepest recorded oceanic trench measured to date is the Mariana Trench, near the Philippines, in the Pacific Ocean at {{convert|10,924|m|ft|abbr=on}}. At such depths, water pressure is extreme and there is no sunlight, but some life still exists. A white flatfish, a shrimp and a jellyfish were seen by the crew of the bathyscaphe Trieste when it dove to the bottom in 1960, which led to scientific debate surrounding the likelihood of bony fish surviving in such deep waters. General scientific consensus has discredited the possible viewing of a flatfish at such depths.{{Cite journal |last=Yancey |first=Paul H. |last2=Gerringer |first2=Mackenzie E. |last3=Drazen |first3=Jeffrey C. |last4=Rowden |first4=Ashley A. |last5=Jamieson |first5=Alan |date=2014-03-25 |title=Marine fish may be biochemically constrained from inhabiting the deepest ocean depths |url=https://pnas.org/doi/full/10.1073/pnas.1322003111 |journal=Proceedings of the National Academy of Sciences |language=en |volume=111 |issue=12 |pages=4461–4465 |doi=10.1073/pnas.1322003111 |issn=0027-8424|pmc=3970477 }}Polmar, Norman; Mathers, Lee J. (January 2020). "The First Deepest Dive". U.S. Naval Institute Proceedings. 146/1/1, 403.{{Cite journal |last=Jamieson |first=Alan J. |last2=Yancey |first2=Paul H. |date=June 2012 |title=On the Validity of the Trieste Flatfish: Dispelling the Myth |url=https://www.journals.uchicago.edu/doi/10.1086/BBLv222n3p171 |journal=The Biological Bulletin |language=en |volume=222 |issue=3 |pages=171–175 |doi=10.1086/BBLv222n3p171 |issn=0006-3185 |via=University of Chicago Press Journals}}[http://bjsonline.com/watches/articles/0022_3.shtml Seven Miles Down: The Story of The Bathyscaph Trieste.] {{webarchive|url=https://web.archive.org/web/20070202144233/http://bjsonline.com/watches/articles/0022_3.shtml |date=2007-02-02 }}, Rolex Deep Sea Special, January 2006.

In general, the deep sea is considered to start at the aphotic zone, the point where sunlight loses its power of transference through the water.{{Cite web|url=https://www.encyclopedia.com/earth-and-environment/geology-and-oceanography/geology-and-oceanography/aphotic-zone|title=Aphotic Zone {{!}} Encyclopedia.com|website=www.encyclopedia.com|access-date=2018-12-06|archive-date=2023-07-10|archive-url=https://web.archive.org/web/20230710092355/https://www.encyclopedia.com/earth-and-environment/geology-and-oceanography/geology-and-oceanography/aphotic-zone|url-status=live}} Many life forms that live at these depths have the ability to create their own light known as bio-luminescence. Marine life also flourishes around seamounts that rise from the depths, where fish and other sea life congregate to spawn and feed. Hydrothermal vents along the mid-ocean ridge spreading centers act as oases, as do their opposites, cold seeps. Such places support unique biomes and many new microbes and other lifeforms have been discovered at these locations. There is still much more to learn about the deeper parts of the ocean.{{Cite book|url=https://books.google.com/books?id=nAAtDwAAQBAJ&q=%22Deep-Sea+Fishes%22|title=Deep-Sea Fishes: Biology, Diversity, Ecology and Fisheries|isbn=9781107083820|last1=Priede|first1=Imants G.|pages = 12–13 |date=10 August 2017|publisher=Cambridge University Press }}

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{{main article|Marine life}}

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In biology, many phyla, families and genera have some species that live in the sea and others that live on land. Marine biology classifies species based on their environment rather than their taxonomy. For this reason, marine biology encompasses not only organisms that live only in a marine environment, but also other organisms whose lives revolve around the sea.

{{main article|Marine microorganism}}

As inhabitants of the largest environment on Earth, microbial marine systems drive changes in every global system. Microbes are responsible for virtually all photosynthesis that occurs in the ocean, as well as the cycling of carbon, nitrogen, phosphorus and other nutrients and trace elements.{{cite web |url=https://www.sciencedaily.com/releases/2015/12/151210181647.htm |title=Functions of global ocean microbiome key to understanding environmental changes |date=December 10, 2015 |website=www.sciencedaily.com |publisher=University of Georgia |access-date=December 11, 2015 |archive-date=December 14, 2015 |archive-url=https://web.archive.org/web/20151214175012/http://www.sciencedaily.com/releases/2015/12/151210181647.htm |url-status=live }}

Microscopic life undersea is incredibly diverse and still poorly understood. For example, the role of viruses in marine ecosystems is barely being explored even in the beginning of the 21st century.{{cite journal|last=Suttle

|first=C.A.|title=Viruses in the Sea|journal=Nature|year=2005|volume=437|issue=9|pages=356–361|doi=10.1038/nature04160|pmid=16163346|bibcode=2005Natur.437..356S|s2cid=4370363}}

The role of phytoplankton is better understood due to their critical position as the most numerous primary producers on Earth. Phytoplankton are categorized into cyanobacteria (also called blue-green algae/bacteria), various types of algae (red, green, brown, and yellow-green), diatoms, dinoflagellates, euglenoids, coccolithophorids, cryptomonads, chrysophytes, chlorophytes, prasinophytes, and silicoflagellates.

Zooplankton tend to be somewhat larger, and not all are microscopic. Many Protozoa are zooplankton, including dinoflagellates, zooflagellates, foraminiferans, and radiolarians. Some of these (such as dinoflagellates) are also phytoplankton; the distinction between plants and animals often breaks down in very small organisms. Other zooplankton include cnidarians, ctenophores, chaetognaths, molluscs, arthropods, urochordates, and annelids such as polychaetes. Many larger animals begin their life as zooplankton before they become large enough to take their familiar forms. Two examples are fish larvae and sea stars (also called starfish).

{{main article|Marine algae and plants}}

Microscopic algae and plants provide important habitats for life, sometimes acting as hiding places for larval forms of larger fish and foraging places for invertebrates.

Algal life is widespread and very diverse under the ocean. Microscopic photosynthetic algae contribute a larger proportion of the world's photosynthetic output than all the terrestrial forests combined. Most of the niche occupied by sub plants on land is actually occupied by macroscopic algae in the ocean, such as Sargassum and kelp, which are commonly known as seaweeds that create kelp forests.

Plants that survive in the sea are often found in shallow waters, such as the seagrasses (examples of which are eelgrass, Zostera, and turtle grass, Thalassia). These plants have adapted to the high salinity of the ocean environment. The intertidal zone is also a good place to find plant life in the sea, where mangroves or cordgrass or beach grass might grow.

{{Main|Marine invertebrates}}

As on land, invertebrates, or animals that lack a backbone, make up a huge portion of all life in the sea. Invertebrate sea life includes Cnidaria such as jellyfish and sea anemones; Ctenophora; sea worms including the phyla Platyhelminthes, Nemertea, Annelida, Sipuncula, Echiura, Chaetognatha, and Phoronida; Mollusca including shellfish, squid, octopus; Arthropoda including Chelicerata and Crustacea; Porifera; Bryozoa; Echinodermata including starfish; and Urochordata including sea squirts or tunicates.

{{main|Marine fungi}}

Over 10,000{{Cite journal|last1=Amend|first1=Anthony|last2=Burgaud|first2=Gaetan|last3=Cunliffe|first3=Michael|last4=Edgcomb|first4=Virginia P.|last5=Ettinger|first5=Cassandra L.|last6=Gutiérrez|first6=M. H.|last7=Heitman|first7=Joseph|last8=Hom|first8=Erik F. Y.|last9=Ianiri|first9=Giuseppe|last10=Jones|first10=Adam C.|last11=Kagami|first11=Maiko|date=2019-03-05|title=Fungi in the Marine Environment: Open Questions and Unsolved Problems|journal=mBio|volume=10|issue=2|language=EN|doi=10.1128/mBio.01189-18|pmid=30837337|pmc=6401481|s2cid=73481006}}{{Dead link|date=October 2022 |bot=InternetArchiveBot |fix-attempted=yes }} species of fungi are known from marine environments.{{cite journal|last=Hyde|first=K.D. |author2=E.B.J. Jones |author3=E. Leaño |author4=S.B. Pointing |author5=A.D. Poonyth |author6=L.L.P. Vrijmoed|title=Role of fungi in marine ecosystems|journal=Biodiversity and Conservation|year=1998|volume=7|issue=9|pages=1147–1161|doi=10.1023/A:1008823515157|bibcode=1998BiCon...7.1147H |s2cid=22264931 }} These are parasitic on marine algae or animals, or are saprobes on algae, corals, protozoan cysts, sea grasses, wood and other substrata, and can also be found in sea foam.Kirk, P.M., Cannon, P.F., Minter, D.W. and Stalpers, J. "Dictionary of the Fungi". Edn 10. CABI, 2008 Spores of many species have special appendages which facilitate attachment to the substratum.{{cite journal|last=Hyde|first=K.D.|author2=E.B.J. Jones|title=Spore attachment in marine fungi|journal=Botanica Marina|year=1989|volume=32|issue=3|pages=205–218|doi=10.1515/botm.1989.32.3.205|s2cid=84879817}} A very diverse range of unusual secondary metabolites is produced by marine fungi.{{cite journal|last=San-Martín|first=A. |author2=S. Orejanera |author3=C. Gallardo |author4=M. Silva |author5=J. Becerra |author6=R. Reinoso |author7=M.C. Chamy |author8=K. Vergara |author9=J. Rovirosa|title=Steroids from the marine fungus Geotrichum sp|journal=Journal of the Chilean Chemical Society|year=2008|volume=53|issue=1|pages=1377–1378|doi=10.4067/S0717-97072008000100011 |doi-access=free }}

{{main article|Marine vertebrates}}

{{main article|Fish}}

A reported 33,400 species of fish, including bony and cartilaginous fish, had been described by 2016,{{cite web |url=http://www.fishbase.org/ |title=Fishbase |access-date=6 February 2017 |archive-date=17 October 2017 |archive-url=https://web.archive.org/web/20171017132213/http://www.fishbase.org/ |url-status=live }} more than all other vertebrates combined. About 60% of fish species live in saltwater.{{cite book |author=Moyle, P. B.; Leidy, R. A. |date=1992 |title=Loss of biodiversity in aquatic ecosystems: Evidence from fish faunas |pages=128–169 |editor=Fiedler, P. L.; Jain, S. A. Jain |work=Conservation Biology: the theory and practice of nature conservation, preservation, and management |publisher=Chapman and Hall}}

{{Main|Marine reptile}}

Reptiles which inhabit or frequent the sea include sea turtles, sea snakes, terrapins, the marine iguana, and the saltwater crocodile. Most extant marine reptiles, except for some sea snakes, are oviparous and need to return to land to lay their eggs. Thus most species, excluding sea turtles, spend most of their lives on or near land rather than in the ocean. Despite their marine adaptations, most sea snakes prefer shallow waters nearby land, around islands, especially waters that are somewhat sheltered, as well as near estuaries.Stidworthy J. 1974. Snakes of the World. Grosset & Dunlap Inc. 160 pp. {{ISBN|0-448-11856-4}}.[ftp://ftp.fao.org/docrep/fao/009/y0870e/y0870e65.pdf Sea snakes]{{dead link|date=January 2018 |bot=InternetArchiveBot |fix-attempted=yes }} at [http://www.fao.org/ Food and Agriculture Organization of the United Nations] {{Webarchive|url=https://web.archive.org/web/20120711004347/http://www.fao.org/ |date=2012-07-11 }}. Accessed 7 August 2007. Some extinct marine reptiles, such as ichthyosaurs, evolved to be viviparous and had no requirement to return to land.

{{Main|Seabird}}

Birds adapted to living in the marine environment are often called seabirds. Examples include albatross, penguins, gannets, and auks. Although they spend most of their lives in the ocean, species such as gulls can often be found thousands of miles inland.

{{Main|Marine mammal}}

There are five main types of marine mammals: cetaceans (toothed whales and baleen whales); sirenians such as manatees; pinnipeds including seals and the walrus; sea otters; and the

polar bear. All are air-breathing, meaning that while some such as the sperm whale can dive for prolonged periods, all must return to the surface to breathe.{{Cite journal | doi=10.1371/journal.pone.0019653| pmid=21625431| title=Current and Future Patterns of Global Marine Mammal Biodiversity| journal=PLOS ONE| volume=6| issue=5| pages=e19653| year=2011| last1=Kaschner | first1=K. | last2=Tittensor | first2=D. P. | last3=Ready | first3=J. | last4=Gerrodette | first4=T. | last5=Worm | first5=B. | bibcode=2011PLoSO...619653K| pmc=3100303| doi-access=free}}{{Cite journal | last1=Pompa | first1=S. | last2=Ehrlich | first2=P. R. | last3=Ceballos | first3=G. | doi=10.1073/pnas.1101525108 | pmid=21808012 | title=Global distribution and conservation of marine mammals | journal=Proceedings of the National Academy of Sciences| volume=108 | issue=33 | pages=13600–13605| date=2011-08-16 | bibcode=2011PNAS..10813600P | pmc=3158205 | doi-access=free }}

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The marine ecosystem is large, and thus there are many sub-fields of marine biology. Most involve studying specializations of particular animal groups, such as phycology, invertebrate zoology and ichthyology. Other subfields study the physical effects of continual immersion in sea water and the ocean in general, adaptation to a salty environment, and the effects of changing various oceanic properties on marine life. A subfield of marine biology studies the relationships between oceans and ocean life, and global warming and environmental issues (such as carbon dioxide displacement). Recent marine biotechnology has focused largely on marine biomolecules, especially proteins, that may have uses in medicine or engineering. Marine environments are the home to many exotic biological materials that may inspire biomimetic materials.

Through constant monitoring of the ocean, there have been discoveries of marine life which could be used to create remedies for certain diseases such as cancer and leukemia. In addition, Ziconotide, an approved drug used to treat pain, was created from a snail which resides in the ocean.{{cite journal |last1=Malve |first1=Harshad |title=Exploring the ocean for new drug developments: Marine pharmacology |journal=Journal of Pharmacy & Bioallied Sciences |date=2016 |volume=8 |issue=2 |pages=83–91 |doi=10.4103/0975-7406.171700 |pmid=27134458 |pmc=4832911 |doi-access=free }}

Marine biology is a branch of biology. It is closely linked to oceanography, especially biological oceanography, and may be regarded as a sub-field of marine science. It also encompasses many ideas from ecology. Fisheries science and marine conservation can be considered partial offshoots of marine biology (as well as environmental studies). Marine chemistry, physical oceanography and atmospheric sciences are also closely related to this field.

An active research topic in marine biology is to discover and map the life cycles of various species and where they spend their time. Technologies that aid in this discovery include pop-up satellite archival tags, acoustic tags, and a variety of other data loggers. Marine biologists study how the ocean currents, tides and many other oceanic factors affect ocean life forms, including their growth, distribution and well-being. This has only recently become technically feasible with advances in GPS and newer underwater visual devices.{{Cite journal |last1=Hulbert |first1=Ian A.R. |last2=French |first2=John |date=21 December 2001 |title=The accuracy of GPS for wildlife telemetry and habitat mapping: GPS for telemetry and mapping |journal=Journal of Applied Ecology |language=en |volume=38 |issue=4 |pages=869–878 |doi=10.1046/j.1365-2664.2001.00624.x|doi-access=free }}

Most ocean life breeds in specific places, nests in others, spends time as juveniles in still others, and in maturity in yet others. Scientists know little about where many species spend different parts of their life cycles especially in the infant and juvenile years. For example, it is still largely unknown where juvenile sea turtles and some sharks in the first year of their life travel. Recent advances in underwater tracking devices are illuminating what we know about marine organisms that live at great ocean depths.{{Cite web | url=http://us7.campaign-archive2.com/?u=82eb97f4b587306a3537ecf16&id=e398851e6b&e=%5BUNIQID%5D | title=March 2014 Newsletter - What's Going on at Desert Star}} The information that pop-up satellite archival tags gives aids in fishing closures for certain times of the year and the development of marine protected areas. This data is important to both scientists and fishermen because they are discovering that, by restricting commercial fishing in one small area, they can have a large impact in maintaining a healthy fish population in a much larger area.

{{main|History of marine biology}}

File:Scyliorhinus retifer embryo.JPG recorded that the embryo of a dogfish was attached by a cord to a kind of placenta (the yolk sac).{{cite book|author=Leroi, Armand Marie|title=The Lagoon: How Aristotle Invented Science|title-link=Aristotle's Lagoon|date=2014|publisher=Bloomsbury|isbn=978-1-4088-3622-4|pages=72–74|author-link=Armand Marie Leroi}}]]

The study of marine biology dates to Aristotle (384–322 BC), who made many observations of life in the sea around Lesbos, laying the foundation for many future discoveries."History of the Study of Marine Biology - MarineBio.org". MarineBio Conservation Society. Web. Monday, March 31, 2014. In 1768, Samuel Gottlieb Gmelin (1744–1774) published the Historia Fucorum, the first work dedicated to marine algae and the first book on marine biology to use the new binomial nomenclature of Linnaeus. It included elaborate illustrations of seaweed and marine algae on folded leaves.Gmelin S G (1768) [https://books.google.com/books?id=YUAAAAAAQAAJ&q=%22Historia+Fucorum%22 Historia Fucorum] Ex typographia Academiae scientiarum, St. Petersburg.Silva PC, Basson PW and Moe RL (1996) [https://books.google.com/books?id=vuWEemVY8WEC&dq=%22Historia+Fucorum%22+binomial+nomenclature&pg=PA2 Catalogue of the Benthic Marine Algae of the Indian Ocean] {{Webarchive|url=https://web.archive.org/web/20230405201157/https://books.google.com/books?id=vuWEemVY8WEC&dq=%22Historia+Fucorum%22+binomial+nomenclature&pg=PA2 |date=2023-04-05 }} page 2, University of California Press. {{ISBN|9780520915817}}. The British naturalist Edward Forbes (1815–1854) is generally regarded as the founder of the science of marine biology.{{cite web|title=A Brief History of Marine Biology and Oceanography|url=http://www.meer.org/ebook/mbhist.htm|access-date=31 March 2014|archive-date=3 August 2020|archive-url=https://web.archive.org/web/20200803202907/http://www.meer.org/ebook/mbhist.htm|url-status=dead}} The pace of oceanographic and marine biology studies quickly accelerated during the course of the 19th century.

File:Challenger.jpg of 1872–1876}}]]

The observations made in the first studies of marine biology fueled the Age of Discovery and exploration that followed. During this time, a vast amount of knowledge was gained about the life that exists in the oceans of the world. Many voyages contributed significantly to this pool of knowledge. Among the most significant were the voyages of {{HMS|Beagle}} where Charles Darwin came up with his theories of evolution and on the formation of coral reefs.Ward, Ritchie R. Into the ocean world; the biology of the sea. 1st ed. New York: Knopf; [distributed by Random House], 1974: 161 Another important expedition was undertaken by HMS Challenger, where findings were made of unexpectedly high species diversity among fauna stimulating much theorizing by population ecologists on how such varieties of life could be maintained in what was thought to be such a hostile environment.Gage, John D., and Paul A. Tyler. Deep-sea biology: a natural history of organisms at the deep-sea floor. Cambridge: Cambridge University Press, 1991: 1 This era was important for the history of marine biology but naturalists were still limited in their studies because they lacked technology that would allow them to adequately examine species that lived in deep parts of the oceans.

The creation of marine laboratories was important because it allowed marine biologists to conduct research and process their specimens from expeditions. The oldest marine laboratory in the world, Station biologique de Roscoff, was established in Concarneau, France founded by the College of France in 1859.{{Cite web|date=2018-06-17|title=A History Of The Study Of Marine Biology ~ MarineBio Conservation Society|url=https://www.marinebio.org/creatures/marine-biology/history-of-marine-biology/|access-date=2022-02-17|language=en-US}} In the United States, the Scripps Institution of Oceanography dates back to 1903, while the prominent Woods Hole Oceanographic Institute was founded in 1930.Maienschein, Jane. 100 years exploring life, 1888-1988: the Marine Biological Laboratory at Woods Hole. Boston: Jones and Bartlett Publishers, 1989: 189-192 The development of technology such as sound navigation and ranging, scuba diving gear, submersibles and remotely operated vehicles allowed marine biologists to discover and explore life in deep oceans that was once thought to not exist.{{cite web|last=Anderson|first=Genny|title=Beginnings: History of Marine Science|url=http://marinebio.net/marinescience/01intro/behist.htm|access-date=2014-04-08|archive-date=2012-12-20|archive-url=https://web.archive.org/web/20121220034255/http://www.marinebio.net/marinescience/01intro/behist.htm|url-status=live}} Public interest in the subject continued to develop in the post-war years with the publication of Rachel Carson's sea trilogy (1941–1955).

In 1960, the bathyscaphe Trieste descended the furthest point man had yet traveled, bottoming Challenger's Deep at 35,797 feet. The vessel was captained by Jacques Piccard and Don Walsh, whose discoveries while at the bottom of the ocean bolstered scientific discussion and interest about life in the hadal zone.

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{{reflist|32em}}

• Morrissey J and Sumich J (2011) [https://books.google.com/books?id=2cm_s-I01kcC&q=%22Introduction+to+the+Biology+of+Marine+Life%22 Introduction to the Biology of Marine Life] {{Webarchive|url=https://web.archive.org/web/20201110191007/https://books.google.rs/books?id=2cm_s-I01kcC&printsec=frontcover&dq=%22Introduction+to+the+Biology+of+Marine+Life%22&hl=en&sa=X&ei=xGpWVMDQDuXUmgXO74KACA&redir_esc=y |date=2020-11-10 }} Jones & Bartlett Publishers. {{ISBN|9780763781606}}.
• Mladenov, Philip V., Marine Biology: A Very Short Introduction, 2nd edn (Oxford, 2020; online edn, Very Short Introductions online, Feb. 2020), http://dx.doi.org/10.1093/actrade/9780198841715.001.0001, accessed 21 Jun. 2020.

{{Commons category}}

• [http://ocean.si.edu/ Smithsonian Ocean Portal] {{Webarchive|url=https://web.archive.org/web/20100623005244/http://ocean.si.edu/ |date=2010-06-23 }}
• [http://www.mcsuk.org/ Marine Conservation Society] {{Webarchive|url=https://web.archive.org/web/20080731214736/http://www.mcsuk.org/ |date=2008-07-31 }}
• [https://archive.today/20130111125741/http://www.wileyonlinelibrary.com/journal/maec Marine Ecology – an evolutionary perspective]
• [http://onlinelibrary.wiley.com/doi/10.1111/mae.2011.32.issue-s1/issuetoc Free special issue: Marine Biology in Time and Space] {{Webarchive|url=https://web.archive.org/web/20170630032806/http://onlinelibrary.wiley.com/doi/10.1111/mae.2011.32.issue-s1/issuetoc |date=2017-06-30 }}
• [https://www.youtube.com/watch?v=iGRJjuMLMgE Creatures of the deep ocean] {{Webarchive|url=https://web.archive.org/web/20131112235447/http://www.youtube.com/watch?v=iGRJjuMLMgE |date=2013-11-12 }} – National Geographic documentary, 2010.
• [http://www.exploris.org.uk Exploris] {{Webarchive|url=https://web.archive.org/web/20060207100344/http://www.exploris.org.uk/ |date=2006-02-07 }}
• [http://content.lib.washington.edu/fishweb/index.html Freshwater and Marine Image Bank] {{Webarchive|url=https://web.archive.org/web/20131008011909/http://content.lib.washington.edu/fishweb/index.html |date=2013-10-08 }} – From the University of Washington Library
• [http://www.marinetraining.eu Marine Training Portal] {{Webarchive|url=https://web.archive.org/web/20160630085826/http://www.marinetraining.eu/ |date=2016-06-30 }} – Portal grouping training initiatives in the field of Marine Biology

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