Mycteroperca bonaci Mycteroperca bonaci , the black grouper , black rockfish or marbled rockfish , 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. Other fish are sometimes called the black grouper including the similar gag grouper , the misty grouper , and the critically endangered Warsaw grouper . This species is found in the western Atlantic Ocean from the northeastern United States to Brazil.Description Myctoperca bonaci has an oblong, leterally compressed body with a standard length which is 3.3 to 3.5 times its depth. It has an evenly rounded preopercle with no incisions or lobes at its angle. The dorsal fin contains 11 spines and 15-17 soft rays while the anal fin has 3 spines and 11-13 soft rays, both fins having rounded margins. The caudal fin is truncate to emarginate, althoughit may be convex if spread widely.This species has an overall t’s an olive grey colour and is marked with dark blotches and brassy hexagonal spots over the head and flanks. The pectoral fins are sooty brown, fading to orange towards the margin; the soft rayed part of the dorsal fin and the anal fin, as well as the forward edge of the pelvic fin have a dark margin. This fish attains a maximum total length of, although they are more common at around and a maximum published weight of.Distribution Mycteroperca bonaci is found in the western Atlantic where its range extends from Cape Canaveral in Florida and Bermuda south to the Bahamas , into the Gulf of Mexico as far north as Alabama and from southern Texas along the coast of Mexico and Cuba. It occurs throughout the Caribbean Sea , along the coast of South America to Santa Catarina in Brazil. Its range extends to the Brazilian islands of Trinidade and Fernando de Noronha . There is a gap in its distribution along the northern coast of South America between Paramaribo in Suriname and Maranhao in Brazil. Occurrences in Unites States waters north to Massachusetts are juveniles and therefore considered vagrants .Habitat and biology Mycteroperca bonaci occurs over rocky bottoms and coral reefs at depths of, however in the eastern Gulf of Mexico it is normally encountered at depths of more than. It is usually a solitary species, the adults feeding mainly on fishes, such as grunts, snapper and herrings, and the juveniles feed on crustaceans. Black groupers have been recorded forming seasonal feeding aggregations along the outer continental shelf off Brazil, these coincide with spawning aggregations of some fish species the groupers prey on. They are is a monandric protogynous hermaphrodites and they form spawning aggregations and these have been reported from in the Gulf of Mexico and Caribbean Sea . Females attain sexual maturity at around 5years old and at a length of around and the chenge of sex to males occurs when they are around 15 years old and at a mean length of.The recorded predators of Mycteroperca bonaci include sandbar shark and great hammerhead while they may also be prey for great barracuda and moray eels . Black groupers are hosts to a variety of common parasites which include endoparasites affecting stomach and intestines and ectoparasites which live on its skin.Taxonomy Mycteroperca bonaci was first formally described as Serranus bonaci in 1860 by the Cuban zoologist Felipe Poey with Cuba being given as the type locality .Utilisation Mycteroperca bonaci is quite tasty and an important food fish . It is fished for sale and for sport .Conservation Mycteroperca bonaci is an IUCN Red List near threatened species , vulnerable to increases in exploitation because it is a relatively slow breeder.External Links
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