Depth
Muraena · Bony Fish

Mediterranean moray

Muraena helena

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
High
Sighting Likelihood
Kingdom Animalia
Phylum Chordata
Class Actinopterygii
Genus Muraena
Species helena

Bony Fish

Identification & Biology

  • IdentificationLarge, muscular eel with a laterally compressed body. Dark brown to purplish-black body covered with a dense pattern of yellow spots and mottling. Wide mouth with prominent teeth visible when the mouth opens rhythmically for breathing.
  • SizeUp to 150 cm total length, commonly 80 to 120 cm.
  • Social HabitSolitary and territorial. Occupies caves and crevices during the day, hunting at night. May share a cave with other morays.
  • HabitatRocky reefs, boulder fields, caves, wrecks, and any rocky structure with suitable holes.
  • Depth1 to 80 m, most common between 5 and 40 m.
  • Feeds OnFish, cephalopods, and crustaceans hunted at night using its excellent sense of smell. Has a second set of jaws (pharyngeal jaws) deep in the throat.
  • DistributionEastern Atlantic from the Bay of Biscay to Senegal, including the entire Mediterranean Sea.
  • DescriptionThe most iconic eel in the Mediterranean and a familiar face on virtually every rocky dive. The rhythmic opening and closing of its mouth may look threatening, but this is simply breathing. The Mediterranean moray possesses pharyngeal jaws that shoot forward to drag prey down the throat. Despite its fearsome appearance, it is not aggressive toward divers unless provoked.

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.

Mediterranean moray species card

Biology

Behaviour & Diet

Feeding Strategy

A nocturnal ambush predator with a second set of pharyngeal jaws that pull prey into the throat. Hunts fish, octopus and crustaceans.

Ambush predator

Reproduction

Spawns pelagic eggs in summer. Larvae pass through a transparent leptocephalus stage that drifts in open water before settling.

Pelagic spawner

Behaviour & Defence

Powerful jaws deliver a strong bite if provoked. Mucus-covered, scaleless skin is difficult for predators to grip.

Strong bite

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Where to Encounter in Malta

The following dive sites offer strong habitat match for Muraena helena. 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