Depth
Labrus · Bony Fish

Brown wrasse

Labrus merula

0-40m
Depth Range
Variable
Max Size
Mediterranean
Distribution
0-40m
Depth Range
Variable
Max Size
Rocky Reef
Habitat
Herbivore
Diet
Solitary
Social
LC
IUCN Status
Moderate
Sighting Likelihood
Kingdom Animalia
Phylum Chordata
Class Actinopterygii
Genus Labrus
Species merula

Bony Fish

Identification & Biology

  • IdentificationLarge, robust wrasse with a deep body and thick lips. Uniform dark brown to greenish-brown in adults. Juveniles may be green or show paler markings. White spot sometimes visible on the flank.
  • SizeUp to 65 cm total length, commonly 25 to 40 cm.
  • Social HabitSolitary and territorial. Adults occupy fixed home ranges around rocky structures.
  • HabitatRocky reefs, boulder fields, and seagrass bed edges. Prefers areas with dense cover and structural complexity.
  • Depth2 to 50 m, most common between 5 and 30 m.
  • Feeds OnSea urchins, crustaceans, molluscs, and worms. Crushes hard-shelled prey with strong pharyngeal teeth.
  • DistributionMediterranean Sea and adjacent Atlantic coast from Portugal to Morocco.
  • DescriptionOne of the largest wrasses in the Mediterranean, the brown wrasse is a powerful, slow-moving predator of hard-shelled invertebrates. It is an important sea urchin predator, helping to control populations that might otherwise overgraze algae on rocky reefs. Like most wrasses, it is a protogynous hermaphrodite.

Range

Habitat & Distribution

Found across the Mediterranean, inhabiting rocky reef environments. Active from the surface down to 40m depth.

Where Malta divers have spotted this species

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Sightings are logged by divers using our What Did You See? dive-log tool. View the full live sightings map.

Detail

Preferred Environment

Rocky Reef habitats, typically at depths of 0-40m. Most commonly encountered by divers at the shallower end of its range.

Encounter Tips

Best approached slowly and calmly. Avoid casting shadows directly over the animal. Neutral buoyancy and patience increase encounter success significantly.

Brown wrasse species card

Biology

Behaviour & Diet

Feeding Strategy

Feeds on a wide range of benthic invertebrates including worms, small crabs, gastropods and sea urchins. Uses strong pharyngeal jaws to crush shelled prey.

Benthic predator

Reproduction

A protogynous hermaphrodite. Males construct algae nests on rocky substrates where multiple females deposit eggs, and the male guards them until hatching.

Nest builder

Behaviour & Defence

Buries itself in sand at night or when stressed, wrapping in a mucus cocoon. During the day, relies on swift swimming among rocks to evade predators.

Sand burial

Dive with diveshack

Where to Encounter in Malta

The following dive sites offer strong habitat match for Labrus merula. All are accessible on a guided dive with diveshack.

5-30m
North Malta

Cirkewwa

Rocky reef with caves, arches and ledges hosting a rich diversity of reef species.

View dive site ›
5-50m
Gozo

Blue Hole

One of the Med's most famous reef dive sites. Rocky walls and archways covered in life.

View dive site ›
18-36m
South Malta

Um El Faroud

The wreck lies on a sandy bottom surrounded by rocky reef -- a diverse habitat attracting reef species.

View dive site ›
IUCN Red List Least Concern

Conservation Status

This species is assessed as Least Concern on the IUCN Red List. Mediterranean populations face ongoing pressure from fishing activity, habitat degradation, and climate-driven changes to prey availability.

Source: iNaturalist Guide #888
by Lesley Clements (CC BY-SA)
diveshack Mediterranean Marine Life guide