Goliath grouper
Encyclopedia
The Atlantic goliath grouper or itajara (Epinephelus
itajara), commonly known as the Jewfish is a large saltwater fish of the grouper
family found primarily in shallow tropical waters among coral
and artificial reefs at depths anywhere from 15 (5 m) to 165 feet (50 m). Its range includes the Florida Keys
, the Bahamas, most of the Caribbean
, and practically all of the Brazil
ian coast, where they are known as mero. On some occasions, it is caught in New England off Maine and Massachusetts, but not commonly. In the eastern Atlantic Ocean
, it occurs from Congo
to Senegal
.
swamps, unusual behavior among grouper.
They may reach extremely large sizes, growing to lengths of 8.2 feet (2.5 m) and can weigh as much as 800 pounds (363 kg). The world record for a hook and line-captured specimen is 680 pounds (309 kg), caught off Fernandina Beach, Florida, in 1961. They are usually around 400 pounds when mature. Considered of fine food quality, goliath grouper were a highly sought after quarry for fishermen of all types. The goliath grouper's inquisitive and generally fearless nature makes it a relatively easy prey for spear fishermen. They also tend to spawn in large aggregations, returning like clockwork to the same locations, making them particularly vulnerable to mass harvesting. Until a harvest ban was placed on the species, its population was in rapid decline. The goliath grouper is entirely protected from harvest and is recognized as a critically endangered species by the World Conservation Union
(IUCN). The U.S. began protection in 1990, and the Caribbean in 1993. The species' population has been recovering since the ban; with the fish's slow growth rate, however, it will take some time for populations to return to their previous levels. However, many conservationists are concerned that size-selective harvesting (seeking large fish and throwing back the small ones) may have inadvertently selected for smaller size, and fish of the size encountered so often in the mid-20th century may be lost forever.
Goliath grouper eat crustacean
s, other fish
, octopus
es and young sea turtles. Grouper are preyed upon by large fish such as barracuda
s, moray eel
s and large shark
s.
s, with individuals first maturing as females and only some large adults becoming males. Most grouper
follow this pattern, but it has not yet been verified for the goliath. In fact, Bullock et al. found males could be sexually mature at smaller sizes (~1150 mm) and younger ages (4–6 years) than females (~1225 mm and ~6–8 years).
.
Epinephelus
Epinephelus is a genus of groupers. They are large sea fish. Members of this genus may also be called a Mero.-Species:FishBase lists 99 species:* Areolate grouper, Epinephelus areolatus ....
itajara), commonly known as the Jewfish is a large saltwater fish of the grouper
Grouper
Groupers are fish of any of a number of genera in the subfamily Epinephelinae of the family Serranidae, in the order Perciformes.Not all serranids are called groupers; the family also includes the sea basses. The common name grouper is usually given to fish in one of two large genera: Epinephelus...
family found primarily in shallow tropical waters among coral
Coral
Corals are marine animals in class Anthozoa of phylum Cnidaria typically living in compact colonies of many identical individual "polyps". The group includes the important reef builders that inhabit tropical oceans and secrete calcium carbonate to form a hard skeleton.A coral "head" is a colony of...
and artificial reefs at depths anywhere from 15 (5 m) to 165 feet (50 m). Its range includes the Florida Keys
Florida Keys
The Florida Keys are a coral archipelago in southeast United States. They begin at the southeastern tip of the Florida peninsula, about south of Miami, and extend in a gentle arc south-southwest and then westward to Key West, the westernmost of the inhabited islands, and on to the uninhabited Dry...
, the Bahamas, most of the Caribbean
Caribbean
The Caribbean is a crescent-shaped group of islands more than 2,000 miles long separating the Gulf of Mexico and the Caribbean Sea, to the west and south, from the Atlantic Ocean, to the east and north...
, and practically all of the Brazil
Brazil
Brazil , officially the Federative Republic of Brazil , is the largest country in South America. It is the world's fifth largest country, both by geographical area and by population with over 192 million people...
ian coast, where they are known as mero. On some occasions, it is caught in New England off Maine and Massachusetts, but not commonly. In the eastern Atlantic Ocean
Atlantic Ocean
The Atlantic Ocean is the second-largest of the world's oceanic divisions. With a total area of about , it covers approximately 20% of the Earth's surface and about 26% of its water surface area...
, it occurs from Congo
Democratic Republic of the Congo
The Democratic Republic of the Congo is a state located in Central Africa. It is the second largest country in Africa by area and the eleventh largest in the world...
to Senegal
Senegal
Senegal , officially the Republic of Senegal , is a country in western Africa. It owes its name to the Sénégal River that borders it to the east and north...
.
Description
Young goliath grouper may live in brackish estuaries, canals, and mangroveMangrove
Mangroves are various kinds of trees up to medium height and shrubs that grow in saline coastal sediment habitats in the tropics and subtropics – mainly between latitudes N and S...
swamps, unusual behavior among grouper.
They may reach extremely large sizes, growing to lengths of 8.2 feet (2.5 m) and can weigh as much as 800 pounds (363 kg). The world record for a hook and line-captured specimen is 680 pounds (309 kg), caught off Fernandina Beach, Florida, in 1961. They are usually around 400 pounds when mature. Considered of fine food quality, goliath grouper were a highly sought after quarry for fishermen of all types. The goliath grouper's inquisitive and generally fearless nature makes it a relatively easy prey for spear fishermen. They also tend to spawn in large aggregations, returning like clockwork to the same locations, making them particularly vulnerable to mass harvesting. Until a harvest ban was placed on the species, its population was in rapid decline. The goliath grouper is entirely protected from harvest and is recognized as a critically endangered species by the World Conservation Union
World Conservation Union
The International Union for Conservation of Nature and Natural Resources is an international organization dedicated to finding "pragmatic solutions to our most pressing environment and development challenges." The organization publishes the IUCN Red List, compiling information from a network of...
(IUCN). The U.S. began protection in 1990, and the Caribbean in 1993. The species' population has been recovering since the ban; with the fish's slow growth rate, however, it will take some time for populations to return to their previous levels. However, many conservationists are concerned that size-selective harvesting (seeking large fish and throwing back the small ones) may have inadvertently selected for smaller size, and fish of the size encountered so often in the mid-20th century may be lost forever.
Goliath grouper eat crustacean
Crustacean
Crustaceans form a very large group of arthropods, usually treated as a subphylum, which includes such familiar animals as crabs, lobsters, crayfish, shrimp, krill and barnacles. The 50,000 described species range in size from Stygotantulus stocki at , to the Japanese spider crab with a leg span...
s, other fish
Fish
Fish are a paraphyletic group of organisms that consist of all gill-bearing aquatic vertebrate animals that lack limbs with digits. Included in this definition are the living hagfish, lampreys, and cartilaginous and bony fish, as well as various extinct related groups...
, octopus
Octopus
The octopus is a cephalopod mollusc of the order Octopoda. Octopuses have two eyes and four pairs of arms, and like other cephalopods they are bilaterally symmetric. An octopus has a hard beak, with its mouth at the center point of the arms...
es and young sea turtles. Grouper are preyed upon by large fish such as barracuda
Barracuda
The barracuda is a ray-finned fish known for its large size and fearsome appearance. Its body is long, fairly compressed, and covered with small, smooth scales. Some species could reach up to 1.8m in length and 30 cm in width...
s, moray eel
Moray eel
Moray eels are cosmopolitan eels of the family Muraenidae. The approximately 200 species in 15 genera are almost exclusively marine, but several species are regularly seen in brackish water and a few, for example the freshwater moray can sometimes be found in freshwater...
s and large shark
Shark
Sharks are a type of fish with a full cartilaginous skeleton and a highly streamlined body. The earliest known sharks date from more than 420 million years ago....
s.
Reproduction
Goliath grouper are believed to be protogynous hermaphroditeHermaphrodite
In biology, a hermaphrodite is an organism that has reproductive organs normally associated with both male and female sexes.Many taxonomic groups of animals do not have separate sexes. In these groups, hermaphroditism is a normal condition, enabling a form of sexual reproduction in which both...
s, with individuals first maturing as females and only some large adults becoming males. Most grouper
Grouper
Groupers are fish of any of a number of genera in the subfamily Epinephelinae of the family Serranidae, in the order Perciformes.Not all serranids are called groupers; the family also includes the sea basses. The common name grouper is usually given to fish in one of two large genera: Epinephelus...
follow this pattern, but it has not yet been verified for the goliath. In fact, Bullock et al. found males could be sexually mature at smaller sizes (~1150 mm) and younger ages (4–6 years) than females (~1225 mm and ~6–8 years).
Terminology
The goliath grouper is commonly known as the jewfish; however, in 2001 the Committee on Names of Fishes, a seven-member joint committee of the American Society of Ichthyologists and Herpetologists and the American Fisheries Society made the decision to change the name to "goliath grouper". Genus Epinephelus also includes the Pacific goliath grouperPacific Goliath grouper
The Pacific goliath grouper or quinquefasciatus is a large saltwater fish of the grouper family. It is a relative to the Atlantic goliath grouper....
.
External links
- Florida Museum of Natural History description including alternate names