The fact that most shark species pose no danger to humans must be so unbelievable that encountering a shark that is seemingly not interested in attacking humans is so remarkable that is deserves a special name. Like the shysharks, the Nervous shark (Carcharhinus cautus) has been named because of its timid behavior in regard to humans.
Common im shallow warm costal waters off Australia, the nervous shark is a small species of requiem sharks. Typically 3.3 to 4.3 ft – 1.0 to 1.3 m – long, it is closely related to the blacktip reef shark, but has not as much black fin tips.
Like other requiem sharks, the Nervous shark is ovoviviparous. After 2 to 6 embryos exhausted their yolk supply, they are provisioned by the mother through a placental connection formed from the depleted yolk sac. Gestation lasts usually 10 months, and relatively large, living young are born annually or biennially in shallow nursery areas. Pups measuring 14 to 16 in -35 to 40 cm – long at birth and grow fast. They reach maturity at around four years (males) and six years (females).
Nervous sharks feed from fishes, crustaceans and molluscs, but have been observed taking semiaquatic snakes, too. They aren’t targeted intentionally, but are threatened as bycatch in the prawn trawl fisheries and inshore gill-net and line fisheries.