Badis badis

{{Short description|Species of fish}}

{{Speciesbox

| image = Badis badis.jpg

| image2 = Blauwe badis (vrouw).jpg

| image2_caption = male above, female below

| status = LC

| status_system = IUCN3.1

| status_ref = {{cite iucn |author=Chaudhry, S. |date=2010 |title=Badis badis |volume=2010 |page=e.T168335A6478454 |doi=10.2305/IUCN.UK.2010-4.RLTS.T168335A6478454.en |access-date=20 November 2021}}

| taxon = Badis badis

| authority = (F. Hamilton, 1822)

| synonyms = *Labrus badis Hamilton, 1822

• Labrus fasciata Swainson, 1839
• Cychla fasciata (Swainson, 1839)
• Badis buchanani Bleeker, 1853

| synonyms_ref =

}}

Badis badis, also known as the blue perch or blue badis, is a small species of Asian freshwater fish in the family Badidae of the order Anabantiformes. It is found in ponds, rivers, ditches and swamps in northern India, eastern Pakistan, Bangladesh, Bhutan and Nepal, including the Ganges, Brahmaputra, Mahanadi and Indus basins.{{cite journal | author1=Mirza, M.R. | author2=Mirza, Z.S. | year=2014 | title=Longitudinal Zonation in the Fish Fauna of the Indus River in Pakistan | journal=Biologia (Pakistan) | volume=60 | issue=1 | pages=149–152 }} It is sometimes kept as an aquarium fish. It is a small, predatory fish that feeds on tiny invertebrates. Maximum total length is around {{cvt|8|cm|in|0}}.[https://indiabiodiversity.org/species/show/231731 About Badis badis][http://en.bdfish.org/2011/08/badis-badis-badis/ The length of Badis badis are some record in some countries] It is sexually dimorphic, with males growing larger and more colorful, especially when excited, compared to females. Adult males have blue fins and may display dark vertical bands on the flanks, while the smaller females display little color. Several similar relatives, now recognized as separate Badis species, have historically been confused with Badis badis.{{cite journal | author1=Kullander, S.O. | author2=R. Britz | year=2002 | title=Revision of the family Badidae (Teleostei: Perciformes), with description of a new genus and ten new species | journal=Ichthyological Exploration of Freshwaters | volume=13 | issue=4 | pages=295–372 }} Historically the two genera that now make up the Badidae, Badis and Dario, were placed in the family Nandidae; this is no longer the case.{{FishBase species | genus = Badis | species = badis | month = August | year = 2019 }}