A coastal and freshwater shark inhabiting shallow waters especially in bays, estuaries, rivers, and lakes. Readily penetrates far up rivers and hypersaline bays. Capable of covering great distances (up to 180 kilometers in 24 hours), moving between fresh and brackish water at random. Adults often found near estuaries and freshwater inflows to the sea. Young enter rivers and may be found hundreds of km from the sea. Feeds on bony fishes, other sharks, rays, mantis shrimps, crabs, squid, sea snails, sea urchins, mammalian carrion, sea turtles, and occasionally garbage. Very hardy and lives well in captivity, probably the most dangerous species of tropical shark, it is repeatedly implicated in attacks on humans. Attacks in fresh water are rare (Ref