The dorsal profile of the head and the intraorbital area are convex, The properly has a rounded corner and a finely serrated margin. The gill cover has a convex upper margin.
There are 11 spines and 14-16 soft rays in the dorsal fin while the anal fin has 3 spines and 8 soft rays. The adults are greyish-brown in color overlain with a mottled pattern and with darker fins.
The giant grouper can grow to huge size with the maximum recorded standard length being 270 centimeters (110 in), although they are more common around 180 centimeters (71 in). And a maximum published weight of 400 kilograms (880 lb).
The giant grouper is a species of shallow water and can be found at depths of 1 to 100 meters (3.3 to 328.1 ft). Large specimens have been caught from shore and in harbors.
They are found in caves and in wrecks while the secretive juveniles occur in reefs and are infrequently observed. The adults are mainly solitary and hold territories on the outer reef and in lagoons.
They have also been caught in turbid water over silt or mud sea beds by prawn fishermen. The giant grouper is an opportunistic ambush predator which feeds on a variety of fishes, as well as small sharks, juvenile sea turtles, crustaceans and mollusks which are all swallowed whole.
Fish which inhabit coral reefs and rocky areas favor spiny lobsters as prey and 177 centimeters (70 in) specimen taken of Maui in Hawaii had a stomach contents of two spiny lobsters and a number of crabs. Fish living in estuaries environments in South Africa were found to be feeding almost exclusively on the crab Scylla errata.
They are, however, curious and frequently approach divers closely. They are not generally considered dangerous to humans but divers are advised to treat large specimens with caution and not to hand feed them.
They are aggregate broadcast spawners, usually with several females per male. Studies in captive populations suggest that the dominant male and female begin the spawning event as nearly the only spawners for the first day or two, but other members of the aggregation fertilize more eggs as the event progresses, with even the most recently turned males fathering offspring.
Giant groupers are diabetic protogynous hermaphrodites, meaning that although some males develop from reproductively functional females other males start to produce sperm without ever having gone through a phase as a reproductive female. The giant grouper is a highly valued food fish and is taken by both commercial and recreational fisheries.
As well as the consumption of its flesh its skin, gall bladder and stomach are used in Traditional Chinese Medicine. It is valued in Hong Kong as a live fish for the live reef food fish trade, especially smaller specimens.
This species is cultured in agriculture and this practice is widespread but there is a restricted supply of juveniles, although hatcheries in Taiwan have produced captive bred juveniles, exporting some for to be grown on in other parts of South-East Asia. Many of the fish produced in aquaculture are hybrids between this species and E. fuscoguttatus.
Groupers of the world (family Serranidae, subfamily Epinephrine). “A study into parental assignment of the communal spawning protogynous hermaphrodite, giant grouper (Epimetheus lanceolatus)”.
^ Peter Palma; Akihito Nakamura; Garden XYZ Libunaoa; et al. (2019). “Reproductive development of the threatened giant grouper Epimetheus lanceolatus “.
Accept and close Skip to main contents to acknowledgment of countryside to footer The species has been implicated in fatal attacks on humans, but none are fully documented.
Identification The Queensland Groper has a large mouth and a rounded caudal fin. Juveniles have irregular black and yellow markings.
There are numerous small black spots on the fins. In Australia, it is known from the southern coast of Western Australia, around the tropical north of the country and south to the southern coast of New South Wales.
The map below shows the Australian distribution of the species based on public sightings and specimens in Australian Museums. Source: Atlas of Living Australia.
Feeding and diet Crayfish have been reported as a favorite item of prey. Economic impacts The Queensland Groper has been implicated in fatal attacks on humans.
Blue fin Leather jacket, Thamnaconus legend (Began, 1903) Go back to start of main content back to top of page You have reached the end of the page.
Adults have mottled brown to dark gray stocky bodies. They are often found either hovering in mid water or resting motionless on the substrate.
This specie sound in the Indo-Pacific and is listed as Vulnerable by the International Union for Conservation of Nature (IUCN). Queensland's groupers live in the Indo-Pacific Ocean, from the Hawaiian and Pitcairn Islands, southwest to Australia, north to southern Japan, west to the Red Sea, and south to Alga Bay, South Africa.
This large fish is commonly found in shallow waters in or around coral reefs. This fish has a robust body with a rounded tail and fleshy lips.
Dorsal fin spines of mature individuals increase in size front to back. Queensland's groupers feed on fishes, including avoids and small sharks, spiny lobsters, crustaceans and juvenile sea turtles.
The Queensland grouper is a solitary, slow-moving fish usually found resting motionless on the substrate or hovering mid water. This species is listed as Vulnerable by IUCN due to overfishing.
Queensland's groupers live in the Indo-Pacific Ocean, from the Hawaiian and Pitcairn Islands, southwest to Australia, north to southern Japan, west to the Red Sea, and south to Alga Bay, South Africa. This large fish is commonly found in shallow waters in or around coral reefs.
This fish has a robust body with a rounded tail and fleshy lips. Dorsal fin spines of mature individuals increase in size front to back.
Queensland's groupers feed on fishes, including avoids and small sharks, spiny lobsters, crustaceans and juvenile sea turtles. The Queensland grouper is a solitary, slow-moving fish usually found resting motionless on the substrate or hovering mid water.