Jawfish Family Photographs, and Information – Opistognathidae

 The Jawfish Family – Opistognathidae

There are currently NINE members of the Jawfish or Opistognathidae Family, two from the Atlantic Ocean and seven from the Pacific Ocean are  presented in this website:

FROM THE ATLANTIC (2):

Moustache Jawfish
Opistognathus lonchurus

Dusky Jawfish
Opistognathus whitehursti

FROM THE PACIFIC (7):

Bluespotted Jawfish
Opistognathus rosenblatti

Bullseye Jawfish, Opistognathus scops

Finespotted Jawfish
Opistognathus punctatus

Giant Jawfish
Opistognathus rhomaleus

Longtail Jawfish
Lonchopisthus sinuscalifornicus

Mexican Jawfish, Opistognathus walkeri

Toothy Jawfish, Opistognathus brochus

The fish of the Jawfish or Opistognathidae Family are known in Mexico’s fishing areas as bocónes. They are small to moderately-sized fish with the largest being 50 cm (20 inches) in length; most are much smaller. There are sixty-one global species of Jawfish that have been placed in five genera. They are a circumglobal, tropical, and subtropical family.

Jawfish have moderately elongated and tapering bodies. They are generally various shades of brown with mottling. The enlarged bulbous heads have  a large mouth equipped with moderately-sized canine-like teeth along the sides of the jaws and large eyes found high on the head. Their caudal fin is rounded or lanceolate. Their dorsal fin has a shallow notch between the spinous and soft portions and have 10 or 11 spines and 12 to 21 rays. Their pelvic fins are found anteriorly of their pectoral fins and have 1 spine and 5 segmented rays. The lateral line is high on hat the body and ends under the middle of the dorsal fin. Their bodies are covered with smooth scales.

Jawfish normally live in shallow coastal waters on sandy or rubble substrate adjacent to coral or rocky reefs at depths up to 21 m (70 feet). Some species have been trawled from 100  m (328 feet) to 200 m (656 feet) depths. Jawfish live in elaborate burrows that are self-constructed within the substrate by utilizing their mouths and powerful jaws to excavate sand, small stones, and medium-sized rocks. Their burrows are frequently lined and reinforced with pebbles and shell fragments.

Jawfish are generally found in colonies and feed primarily on benthic and planktonic invertebrates. They exhibit the unusual habit of oral egg incubation. The Jawfishes, in general, are poorly studied with very limited information available about their lifestyle and behavioral patterns including specific details on age, growth, longevity, movement patterns, diet, habitat use, and reproduction.

Jawfish have no commercial importance with the exception that a few are utilized by the aquarium trade on a limited basis. As a food for human consumption, reports vary – they are either good to eat or of limited value and considered a “catch and release” with most being too small in stature to be of interest.