GINGLYMOSTOMATIDAE (NURSE SHARKS)

This relatively uncommon, sluggish shark is typically found resting on sand near coral heads.  It inhabits shallow moats, lagoons, channels, and seaward reefs at depths of 1 to at least 70 m.  It feeds on octopus, crustaceans, and fish and has been observed breaking up small pieces of staghorn coral while in pursuit of prey.  Males mature at a size of 250 cm; females mature at a size of 230 cm and give birth to up to four or more live young.  The Nurse Shark may be distinguished from Guam’s other sharks by its relatively small mouth, the long barbel in front of each nostril, and the absence of a lower lobe on its tail.  It is normally harmless and timid but capable of causing injury if provoked.

INDO-PACIFIC: Red Sea to Samoa, n. to Taiwan, s. to New Caledonia.