The hooktooth shark, Chaenogaleus macrostoma, is a weasel shark of the family Hemigaleidae, the only member of the genus Chaenogaleus. It is found in the tropical Indo-West Pacific oceans between latitudes 30° N and 10° S, including the Persian Gulf, Pakistan, India, Sri Lanka, Singapore, Thailand, Viet Nam, China, ******, and Java and Sulawesi in Indonesia, from the surface to a depth of 59 meters. It can reach a length of 1 meter.