HomeFish encyclopediaRay-finned fishesPerch-like fishPerchesNaked sand darter Naked sand darter (Ammocrypta beanii) Scientific name: Ammocrypta beanii Jordan, 1877 The Naked sand darter (Ammocrypta beanii) is a freshwater fish of the family Percidae. BiologyInhabits sandy runs of creeks and small to medium rivers.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameAmmocrypta beaniiFamilyPercidae (Perches)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length7.2Common length4.2EnvironmentFreshwater; demersalClimateTemperateDistributionNorth America: occurs only in the Mississippi River and western Gulf drainages in western Tennessee, Alabama and Mississippi, and in eastern Louisiana as far east as the Mobile Bay drainage in the USA.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessResilienceLow, minimum population doubling time 4.5 - 14 years (Fec=22-71) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026