"Paleback darter"@en . . . . "VU" . . "The paleback darter (Etheostoma pallididorsum) is a species of darter endemic to Arkansas, USA. It is only known to occur in the Caddo River and in Hallmans Creek, a tributary of the Ouachita River. This species inhabits headwaters and creeks where it lives in rocky, shallow pools and also in springs with plentiful vegetation growth. This species can reach a length of 6 centimetres (2.4 in) TL though most only reach about 3.9 centimetres (1.5 in)."@en . . . "IUCN3.1" . .