Sturgeons are 28 species of fish in family Acipenseridae. First appeared in Late Cretaceous, evolved from Early Jurassic fish. Family contains four genera: Acipenser, Huso, Scaphirhynchus, and Pseudoscaphirhynchus. Two species may be extinct in wild, one may be entirely extinct
Mullets are a family of ray-finned fish found worldwide in coastal waters. Family includes about 78 species in 26 genera. Distinguished by two dorsal fins, triangular mouths, and lack of lateral line. Feed on detritus with muscular stomachs and complex pharynx
Pangasius is a genus of medium-large to very large shark catfishes. Native to fresh water in South and Southeast Asia. Sometimes refers specifically to commercially important basa fish
Shrimp are elongated crustaceans with long antennae and slender legs. They swim forward using swimmerets and backward using tail flicks. Most shrimp are marine, some live in freshwater. They can live from one to seven years
Fish evolved from filter feeders 535-0 Ma ago. First jawed fish appeared in Silurian, "Age of Fishes". Bony fish evolved after end-Devonian extinction. Teleosts (96% of fish) are bony fishes with protruding jaws
Fish fins are movable appendages that generate thrust and help swim. Most fins are unpaired (dorsal, anal, caudal) and paired (pectoral, pelvic). Fins are supported only by muscles, not directly connected to back bone