What is a Giant Grouper Fish?

The giant grouper is the world’s largest bony fish and also the largest that can be found in the coral reefs. It is also known as bumblebee grouper, brindled grouper, brindle bass and in Australia, the Queensland grouper. Its scientific name is Epinephelus lanceolatus. The giant grouper can grow up to 9 feet long (2.7 m) and can weigh as much as 1320 lb (600 kg) but some unconfirmed reports say that it can grow so much larger. It can be found in the oceans of the Pacific and Indian though, interestingly, it can’t be found in the Persian Gulf. They range from southern Japan to southern Australia and throughout the whole Hawaiian islands. It lives in estuaries, caves and wrecks and shallow reefs.

The giant grouper can be identified by its rounded tail and unusually large mouth. Their body color changes with age. Young giant groupers are bright yellow with irregular black or brown markings while adults are gray with slight mottling. It can be found in shallow waters and can feed on different kinds of marine animals. It is seldom found in deep waters and tend to be solitary. Known diets of these animals are fishes, small sharks, crustaceans and young turtles. Its favorite food though is the spiny lobsters. To aid the fish in its diet, the giant grouper has at least seven rows of teeth on the middle of its lower jaw.

During feeding, the giant grouper fish opens its large mouth to create a suction force that allows it to swallow unsuspecting preys. All food is swallowed whole. It usually lies in wait in the shade to ambush a prey. It is helped by a pair of eyes that is very effective in dim light, which allows it to hunt effectively during dawn and dusk. An unusual thing about the giant grouper is that it starts its life as a female and then later, it switches to male. Pretty amazing, huh? It is because these fishes are protogynous hermaphrodites.

The meat of the giant grouper is considered delicious and highly valued. In Eastern societies, it is said to bring good luck and possesses high medicinal value. In Hawaii it is known as a very delicious and pricey meal. Because of it, the fish is said to be high in demand. Sadly, due to over-fishing, the giant grouper population is disappearing rapidly and it is now listed as “vulnerable” on the International Union for the Conservation of Nature and Natural Resources Red list. They are thought to be disappearing at a rate of 20% per 10 years. Also, the fishes that are caught and sold in the market still are sexually immature which means that the numbers of mature fish that can successfully reproduce in nature are severely limited. What compounds the problem even more is that the fish can live up to more than 50 years old, which means that it can take some time for the younger and smaller fishes to replace the older, larger population in the environment.