Depth
Serranus · Bony Fish

Comber

Serranus cabrilla

0-40m
Depth Range
Variable
Max Size
Mediterranean
Distribution
0-40m
Depth Range
Variable
Max Size
Reef & Open
Habitat
Carnivore
Diet
Solitary
Social
LC
IUCN Status
Kingdom Animalia
Phylum Chordata
Class Actinopterygii
Genus Serranus
Species cabrilla

Bony Fish

Identification & Biology

  • IdentificationSmall, elongated grouper-like body with 7 to 9 dark vertical bars on a sandy to reddish-brown background. A dark longitudinal stripe runs from snout to tail. Large mouth for its size.
  • SizeUp to 25 cm total length, commonly 12 to 18 cm.
  • Social HabitSolitary and territorial. Occupies a fixed home range among rocky structures. A simultaneous hermaphrodite, possessing both male and female reproductive organs.
  • HabitatRocky reefs, boulder fields, and seagrass bed edges from the shallows to moderate depths.
  • Depth2 to 500 m, most common between 5 and 90 m.
  • Feeds OnSmall fish, crustaceans, and worms ambushed from cover.
  • DistributionEastern Atlantic from the British Isles to South Africa, including the entire Mediterranean Sea.
  • DescriptionOne of the most common small predators on Mediterranean rocky reefs. The comber is a simultaneous hermaphrodite, carrying both eggs and sperm at the same time. It sits alertly near cover and dashes out to snatch passing prey. Despite its small size, it is a bold and curious fish that often approaches divers.

Range

Habitat & Distribution

Found across the Mediterranean, inhabiting reef & open 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

Reef & Open 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.

Comber species card

Biology

Behaviour & Diet

Feeding Strategy

An active predator that hunts small fish, crustaceans and worms over rocky and sandy substrates. Approaches prey with slow, deliberate movements before striking.

Active predator

Reproduction

A synchronous hermaphrodite possessing both functional male and female gonads simultaneously. Can self-fertilise in theory, though cross-fertilisation is normal.

Hermaphrodite

Behaviour & Defence

Relies on its striped colouration to break up its body outline against rocky backgrounds. Retreats rapidly into rocky cover when threatened.

Disruptive colour

Dive with diveshack

Where to Encounter in Malta

The following dive sites offer strong habitat match for Serranus cabrilla. 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.

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5-50m
Gozo

Blue Hole

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

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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