Istiophoridae

noun

Distribution: most tropical and subtropical waters. Premaxilla and nasal bones produced, forming a spear-like bill or rostrum with a rounded cross-section. Gill membranes not united to isthmus. Very narrow pelvic fins. Jaw teeth present. Two keels on each side of caudal peduncle in adults. Dorsal fin extending over much of body length; sometimes resembling a sail. Dorsal fin can be depresssed into a groove. Lateral line persists in life. Vertebrae 24. Maximum length 4 m. Bill used for stunning prey fish. The morphological adaptations required for maintaining high brain and retinal temperatures are discussed in Brock et al. 1993 Science 260:210-214. Very popular as game fish.

The family Istiophoridae belongs to the Class Actinopterygii (ray-finned fishes) and the Order Perciformes. It contains 3 genera and 11 species. It may be found in Marine environments and is primarily Marine. Members of this family are not used in the aquarium trade. Reproductively, most members of this family are nonguarders. The main mode of swimming of adult fish in this family is thunniform. Compared with other fish, the activity level of this family tends to be very active. Members of this family have been dated back to the Cretaceous period. Etymology of this family name: Greek, istion = sail + Greek, pherein = to carry