tychoplankton

Tychoplankton (Greek, "tycho", accident, chance) are organisms, such as free-living or attached benthic organisms and other non-planktonic organisms, that are carried into the plankton through a disturbance of their benthic habitat, or by winds and currents.{{cite book|last=Chapman |first=Michael J. |last2=Margulis |first2=Lynn |author2-link=Lynn Margulis |title=Kingdoms and Domains: An Illustrated Guide to the Phyla of Life on Earth |url=https://archive.org/details/fivekingdomsillu00marg_711 |url-access=limited |year=2009 |publisher=Academic Press/Elsevier |location=Amsterdam |isbn=978-0123736215 |pages=[https://archive.org/details/fivekingdomsillu00marg_711/page/n619 566] |edition=4th}} This can occur by direct turbulence or by disruption of the substrate and subsequent entrainment in the water column.{{cite book|editor-last=Simberloff|editor-first=Daniel|title=Encyclopedia of biological invasions|url=https://archive.org/details/encyclopediabiol00simb|url-access=limited|year=2011|publisher=University of California Press|location=Berkeley|isbn=978-0520264212|pages=[https://archive.org/details/encyclopediabiol00simb/page/n760 736]|editor2-last=Rejmánek |editor2-first=Marcel}} Tychoplankton are, therefore, a primary subdivision for sorting planktonic organisms by duration of lifecycle spent in the plankton, as neither their entire lives nor particular reproductive portions are confined to planktonic existence.{{cite book|editor-last=Kennish|editor-first=Michael J.|title=Estuarine Research, Monitoring, and Resource Protection|year=2004|publisher=CRC Press|location=Boca Raton, Fla.|isbn=978-0849319600|pages=194|url=http://www.crcpress.com/product/isbn/0849319609|archive-url=https://archive.today/20130120014208/http://www.crcpress.com/product/isbn/0849319609|url-status=dead|archive-date=2013-01-20}}

They are also known as accidental plankton or pseudo-plankton (compare: pseudoplankton), although "pseudoplankton" also defines organisms that do not themselves float but, rather, are attached to other organisms that float.