Depth
Gobius · Bony Fish

Red-mouthed Goby

Gobius cruentatus

15-40m
Depth Range
Variable
Max Size
Mediterranean
Distribution
15-40m
Depth Range
Variable
Max Size
Sandy / Muddy
Habitat
Carnivore
Diet
Solitary
Social
LC
IUCN Status
Very High
Sighting Likelihood
Kingdom Animalia
Phylum Chordata
Class Actinopterygii
Genus Gobius
Species cruentatus

Bony Fish

Identification & Biology

  • IdentificationMedium-sized goby with a robust body and large head. Pale brown body with darker mottling and saddle marks. The lips and inner mouth are distinctively reddish-orange.
  • SizeUp to 18 cm total length, commonly 8 to 13 cm.
  • Social HabitSolitary and territorial. Males guard egg clutches in rocky crevices.
  • HabitatRocky reefs and boulder fields, often on exposed surfaces near caves and overhangs.
  • Depth2 to 40 m, most common between 5 and 20 m.
  • Feeds OnCrustaceans, worms, molluscs, and other benthic invertebrates.
  • DistributionEastern Atlantic from the British Isles to Morocco, including the Mediterranean Sea.
  • DescriptionOne of the larger and more easily recognised Mediterranean gobies, thanks to the reddish-orange colour of its lips and mouth. It sits prominently on rock surfaces and is often one of the first gobies noticed by divers learning to identify small reef fish.

Range

Habitat & Distribution

Found across the Mediterranean, inhabiting sandy / muddy 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

Sandy / Muddy habitats, typically at depths of 15-40m. 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.

Red-mouthed Goby species card

Biology

Behaviour & Diet

Feeding Strategy

Feeds on small benthic invertebrates, amphipods and detritus found on rocky substrates and in crevices.

Benthic forager

Reproduction

Males prepare nest sites in rock holes or empty shells and guard the eggs until hatching. Spawns in spring and summer.

Egg guarder

Behaviour & Defence

Retreats into rock crevices and holes when disturbed. Cryptic colouration helps it blend with surrounding substrate.

Crevice dweller

Dive with diveshack

Where to Encounter in Malta

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

3-18m
Comino

Blue Lagoon

Extensive sandy floor with excellent visibility. A prime habitat for benthic species that shelter in the sandy channels.

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5-22m
South Malta

Ghar Lapsi

Sheltered cove with sandy patches between rocky outcrops. The sandy areas at 8-15m are rich in benthic marine life.

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8-30m
North Malta

Cirkewwa

Sandy channels flanking the reef system provide excellent habitat for bottom-dwelling species.

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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