Yellowspotted rockcod, Areolate rockcod, Green-spotted rock-cod, Squaretail grouper, Squaretail rock-cod
The areolate grouper (Epinephelus areolatus), also known as the yellowspotted rockcod, areolate rockcod, green-spotted rock-cod, squaretail grouper or squaretail rock-cod, 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 inhabits coral reefs in the Indo-Pacific region. They are produced through aquaculture and commercially fished. They currently face no threats to their survival.
The areolate grouper is a large fish (up to 47 cm long, 1.4 kg) that lives near coral reefs. Its coloration is whitish to gray with rounded brownish spots; it is particularly identifiable by a narrow, white, straight margin on its truncate tail. It has 11 dorsal spines, 15-17 dorsal soft rays, 3 anal spines and 8 anal soft rays.
It is often confused with the brownspotted grouper (Epinephelus chlorostigma) found in the Persian Gulf and several other many-spotted species.
The areolate grouper is found in the tropical region ranging from 35°N - 33°S, 29°E - 180°E. They are found in the Indo-Pacific region from the Red Sea and the Persian Gulf to Natal, South Africa and east to Fiji, north to Japan, south to the Arafura Sea and northern Australia. It was recently recorded to have been observed in Tonga, but appears to be absent from areas in the western Indian Ocean. Recently (2015) a single specimen was reported from the Mediterranean Sea, off Israel.
This grouper is usually found in seagrass beds or on fine sediment bottoms near rocky reefs, dead coral, or alcyonarian corals. in shallow continental shelf waters. Juveniles are common at water depths to 80 m (260 ft); eggs and early larvae are probably pelagic.
Like other groupers, the areolate grouper is a sex-changing species; young are female, and some change to male with maturity. Maturity is reached at a fork length of 22 cm (8.7 in), and spawning usually occurs during the months of May, June, October and December.
After hatching, wild grouper larvae eat copepods and other small zooplankton. Areolate grouper feed on fish and benthic (bottom-dwelling) invertebrates, primarily prawns and crabs.
