 It seems to particularly favor mangrove-lined areas with sandy-muddy bottoms and avoids areas with dense seagrass cover.The diet of the nervous shark consists mainly of small teleost fishes (including silversides, smelt-whitings, wrasses, and grunters).Crustaceans (including prawns, crabs, and mantis shrimps) and molluscs (predominantly cephalopods but also bivalves and gastropods) constitute secondary food sources.