The robust, elongate body of the duskytail grouper is brownish to purplish-grey in colour and covered with numerous small, yellow, orange or gold spots. While the dorsal fin and the upper third of the caudal fin are spotted, the lower two thirds of the caudal fin are dusky in colour, hence the common name. The anal, pectoral and pelvic fins are unspotted, as is the ventral surface of the body (2)(3).
Very little is documented about the biology of the duskytail grouper, but like other Epinephelus species, it is probably a protogynous hermaphrodite, meaning that individuals begin mature life as female and change sex later to become male (2)(4). Epinephelus species tend to be voracious predators, with fish and crustaceans taken near the sea bottom forming the bulk of the prey (2)(5).
Owing to the commercial trawling of adults for food, and the removal of juveniles from the wild for mariculture, the duskytail grouper is thought to be no longer abundant in large parts of its range (1).
Referring to the anal fin, an unpaired fin on the under surface of a fish, behind the anus.
The tail fin of a fish.
Diverse group of arthropods (a phylum of animals with jointed limbs and a hard chitinous exoskeleton) characterised by the possession of two pairs of antennae, one pair of mandibles (parts of the mouthparts used for handling and processing food) and two pairs of maxillae (appendages used in eating, which are located behind the mandibles). Includes crabs, lobsters, shrimps, slaters, woodlice and barnacles.
The unpaired fin found on the back of the body of fish, or the raised structure on the back of most cetaceans.
The cultivation of marine organisms, for food and other products, in the open ocean, an enclosed section of the ocean, or in tanks and ponds filled with seawater.
Referring to the pectoral fins, the pair of fins that are found one on each side of the body just behind the gills. They are generally used for balancing and braking.
In fish, the pair of fins found on the underside of the body.
An animal that begins its life cycle as a female. As the animal ages, based on internal or external triggers, it shifts sex to become a male animal.
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