The Dusky Grouper which is also frequently referred to as the Yellowbelly Grouper or the Squaretail Grouper is the undisputed king of the rocky Mediterranean seabeds and the most iconic member of the Serranidae family. It is a fish with an imposing presence and a bulky and heavy body along with a huge head with fleshy lips. The colour is usually dark brown or grey with characteristic light spots that resemble marble and offer perfect camouflage among the rocks.

The most reliable feature to distinguish it from its relatives involves its tail or caudal fin. The tail of the Dusky Grouper is rounded at its back part and has a characteristic white margin from which its scientific name is derived.

It is a purely benthic, territorial species that lives exclusively on rocky bottoms. It carefully chooses a permanent home, usually a spacious cave or crevice among the rocks with many escape routes. The fish rarely moves away from its home, which it defends with passion. It is encountered at depths from 10 to 50 metres, although large individuals can descend as far as 200 metres.

The Dusky Grouper is a large fish that grows slowly and lives for many years, sometimes exceeding 50 years. The usual weight of capture is 3 to 10 kilograms. However, it is a species that can reach a maximum length of 1.5 metres and a weight exceeding 40, or even 50, kilograms, making it an impressive sight.

The animal is the top predator of its ecosystem. It hunts mainly by ambush, waiting motionless and camouflaged outside its home. Its favourite food consists of cephalopods, particularly octopuses, which constitute its basic prey. It also feeds on fish and large crustaceans such as crabs and lobsters.

Fisheries & Economic Value

It possesses enormous commercial and gastronomic value. The meat is considered among the best, with rich flavour and texture, and is ideal for soup or grilling. It is caught professionally using thick, long lines and nets. For recreational fishers, especially underwater spearfishers, it represents the ultimate trophy. Unfortunately, targeted fishing of large, all-male individuals has led to a decline in their populations.