Sealife guideThe dusky grouperEpinephelus marginatus

Last updated on 08/21/2024 at 10:43 PM
There are several species of groupers found around the world, including the dusky grouper, the big star of the French Mediterranean coast and more generally of the Mediterranean.
Taxonomy
  • Common name: Dusky grouper
  • French name: Mérou brun
  • Spanish name: Mero nebuloso
  • Scientific name: Epinephelus marginatus (Lowe, 1834)
  • Family name: Epinephelidae
  • Order name: Perciformes
  • Class name: Actinopterygii
Description
The dusky grouper measures around 3 feet and can reach up to 5 feet in length.
The dusky grouper has a brownish coloration either solid or mottled with yellow spots depending on the individual
The dusky grouper has a brownish coloration either solid or mottled with yellow spots depending on the individual
Oval in shape, the grouper has a long dorsal fin and is characterized by a mouth surrounded by thick lips.
The dusky grouper has a brownish coloration either solid or mottled with yellow spots depending on the individual.
Geographic range
The dusky grouper is found in the Mediterranean Sea and the Atlantic Ocean, ranging from South Africa to Portugal.
Habitat
The dusky grouper is a sedentary fish that lives close to the seabed, sheltering in rocky crevices or under rocky overhangs.
Its territory typically includes several shelters with one of them being regularly frequented.
The dusky grouper can be found at depths ranging from 16 to 33 feet down to approximately 656 feet.
Diet
The dusky grouper primarily feeds on fish, crustaceans and octopuses.
Reproduction
The dusky grouper has the unique ability to change sex once in its lifetime. It starts as a female at a young age and becomes a male around 10 to 15 years old.
Did you know ?
The dusky grouper can live up to 50 years.
Despite its bulky appearance, it is capable of rapid acceleration to catch its prey.
Fishing with hooks and spearfishing for the dusky grouper (Epinephelus marginatus) are banned along the entire mainland Mediterranean coast. This moratorium on grouper fishing was extended by a prefectural decree on 12/17/2007 until 2013.
Tips for observing
The dusky grouper is not very shy and can be easily approached as long as no sudden movements are made.
Encounter with a dusky grouper
Encounter with a dusky grouper
The video gallery

A dusky grouper (Epinephelus marginatus) waits under the shelter of a rocky overhang

Within the same genus
Atlantic Goliath Grouper (Epinephelus itajara)
Atlantic Goliath Grouper
(Epinephelus itajara)
Brown-marbled grouper (Epinephelus fuscoguttatus)
Brown-marbled grouper
(Epinephelus fuscoguttatus)
Giant grouper (Epinephelus lanceolatus)
Giant grouper
(Epinephelus lanceolatus)
Honeycomb grouper (Epinephelus merra)
Honeycomb grouper
(Epinephelus merra)
Nassau grouper (Epinephelus striatus)
Nassau grouper
(Epinephelus striatus)
Red grouper (Epinephelus morio)
Red grouper
(Epinephelus morio)
Red hind grouper (Epinephelus guttatus)
Red hind grouper
(Epinephelus guttatus)
Starry grouper (Epinephelus labriformis)
Starry grouper
(Epinephelus labriformis)
Within the same family
Bluespotted grouper (Cephalopholis cyanostigma)
Bluespotted grouper
(Cephalopholis cyanostigma)
Coral grouper (Cephalopholis miniata)
Coral grouper
(Cephalopholis miniata)
Darkfin hind (Cephalopholis urodeta)
Darkfin hind
(Cephalopholis urodeta)
Highfin coral grouper (Plectropomus oligacanthus)
Highfin coral grouper
(Plectropomus oligacanthus)
Pacific creolefish (Cephalopholis colonus)
Pacific creolefish
(Cephalopholis colonus)
Peacock grouper (Cephalopholis argus)
Peacock grouper
(Cephalopholis argus)
Roving coral grouper (Plectropomus pessuliferus)
Roving coral grouper
(Plectropomus pessuliferus)
Tomato grouper (Cephalopholis sonnerati)
Tomato grouper
(Cephalopholis sonnerati)
Discover also
Cometfish (Calloplesiops altivelis)
Cometfish
(Calloplesiops altivelis)
European seabass (Dicentrarchus labrax)
European seabass
(Dicentrarchus labrax)
Humpnose bigeye bream (Monotaxis grandoculis)
Humpnose bigeye bream
(Monotaxis grandoculis)
Pixy hawkfish (Cirrhitichthys oxycephalus)
Pixy hawkfish
(Cirrhitichthys oxycephalus)
Pyramid butterflyfish (Hemitaurichthys polylepis)
Pyramid butterflyfish
(Hemitaurichthys polylepis)
Saddle wrasse (Thalassoma duperrey)
Saddle wrasse
(Thalassoma duperrey)
Striped surgeonfish (Acanthurus lineatus)
Striped surgeonfish
(Acanthurus lineatus)
White seabream (Diplodus sargus)
White seabream
(Diplodus sargus)
The marine species from Mediterranean sea
Blotched picarel (Spicara maena)
Blotched picarel
(Spicara maena)
Common bottlenose dolphin (Tursiops truncatus)
Common bottlenose dolphin
(Tursiops truncatus)
False killer whale (Pseudorca crassidens)
False killer whale
(Pseudorca crassidens)
Fried egg jellyfish (Cotylorhiza tuberculata)
Fried egg jellyfish
(Cotylorhiza tuberculata)
Green sea turtle (Chelonia mydas)
Green sea turtle
(Chelonia mydas)
Mediterranean spider crab (Maja squinado)
Mediterranean spider crab
(Maja squinado)
Ocean sunfish (Mola mola)
Ocean sunfish
(Mola mola)
Ringneck blenny (Parablennius pilicornis)
Ringneck blenny
(Parablennius pilicornis)

Our latestUpdates

Dolphins: ocean's smartest creatures
Friday, January 23rd 2026
Dolphins: ocean's smartest creatures
Discover dolphins, the ocean's geniuses: explore their intelligence, social behavior, sophisticated communication, species diversity and vital role in marine ecosystems.
Hvar island
Friday, January 9th 2026
Hvar island
Hvar, a jewel of the Adriatic, captivates with its turquoise waters, wild coves and fragrant lavender fields. Between medieval villages, lively ports, and lush hills, Hvar island offers the perfect mix of relaxation, culture and breathtaking landscapes. Ideal for sun, sea and authentic experiences.
The lemonpeel angelfish
Thursday, January 8th 2026
The lemonpeel angelfish
The lemonpeel angelfish is a small, brightly colored reef fish found in the tropical waters of the Indo-Pacific ocean. It inhabits shallow coral reefs, sheltering among corals and rocky crevices.
Photo of the Day
Serran écriture (Serranus scriba)
Serran écriture
(Serranus scriba)