Pacific goliath grouper
(Epinephelus quinquefasciatus)
General data
The Pacific goliath grouper (Epinephelus quinquefasciatus), also known as the Pacific itajara grouper, is a species of marine ray-finned fish, a grouper from the subfamily Epinephelinae which is part of the family Serranidae, which also includes the anthias and sea basses. It found in the eastern Pacific Ocean where it is associated with reefs. It is related to the Atlantic goliath grouper.
Description
The Pacific goliath grouper has a robust, oblong body. The area between the eyes is wide and flat. The margin of the preopercle has fine serrations and an angled edge.
The dorsal fin contains 11 spines and 15–16 soft rays while the anal fin has 3 spines and 8 soft rays. The caudal fin istail rounded.
The head and body are grey or greenish in colour marked with pale blotches and small dark spots which are scattered over the upper head and body, as well as on the pectoral fins. Subadult fish which are less than 100 centimetres (39 in) in length are overall greenish to tawny brown in colour with diagonal, irregular darker brown bars on the body and caudal fin. The juveniles have heavy spotting on the head, the soft-rayed part of the dorsal fin and the pectoral, pelvic, and caudal fins, They have 5 diagonal black bars on the body which reach onto the dorsal and anal fins and there is a black bar on base of the caudal fin.
This is one of the largest species of grouper, attaining a maximum total length of 250 centimetres (98 in).
Distribution
The Pacific goliath grouper is found in the Eastern Pacific Ocean off the west coasts of the Americas. It is found from the Gulf of California and the Pacific coast of Baja California south to Peru. Its range also includes the islands groups of Revillagigedos in Mexico, Cocos Island in Costa Rica and Malpelo Island in Colombia.
Habitat and biology
The Pacific goliath grouper is found on offshore rocky reefs as adults, although it has also been recorded in inshore areas. The juveniles inhabit mangroves, estuaries, lagoons and bays. It has been recorded feeding on sharks, rays, crustaceans, cephalopods, other fishes and even sea snakes and mammals. Little is known about its biology but it is thought to be similar to the Atlantic goliath grouper.
