Common name: Giant Grouper

General information

The Giant Grouper (Epinephelus lanceolatus), also known as the Queensland Grouper or Brindlebass, is the largest bony fish found in coral reefs and is widely recognized for its impressive size and presence. This species is not commonly kept in home aquariums due to its massive size, which can reach up to 2.7 meters in length and weigh as much as 400 kilograms. However, juvenile specimens are sometimes kept by advanced hobbyists with very large tanks.

The Giant Grouper has a broad, stout body with a large mouth and is typically brownish-yellow in color with irregular dark spots that provide camouflage among the reef.

Care

Due to their potential size, Giant Groupers require extremely large and robust aquarium systems, often beyond the scope of typical home aquariums. Juveniles may be kept in large tanks but will quickly outgrow them. They are carnivorous and require a diet of meaty foods such as fish, squid, and crustaceans. It is crucial to ensure that their dietary needs are met with appropriately sized and nutritionally balanced offerings.

Reproduction

Giant Groupers are protogynous hermaphrodites, meaning they start life as females and can change to males as they mature. Spawning occurs in aggregations, and fertilization is external. In the aquarium, breeding Giant Groupers is not feasible due to their size and the complexity of replicating their natural spawning conditions.

Habitat

The Giant Grouper is found in the Indo-Pacific region, inhabiting coral reefs, rocky areas, and estuaries. They prefer clear waters where they can use their size and strength to dominate their territory and prey. Juveniles are often found in shallower waters, while adults tend to be in deeper areas, sometimes down to 100 meters.