Depth
Scartella · Bony Fish

Molly Miller

Scartella cristata

0-15m
Depth Range
12cm
Max Size
Mediterranean
Distribution
0-15m
Depth Range
12cm
Max Size
Rocky reef
Habitat
Herbivore
Diet
Solitary
Social
LC
IUCN Status
Moderate
Sighting Likelihood
Kingdom Animalia
Phylum Chordata
Class Actinopterygii
Genus Scartella
Species cristata

Bony Fish

Identification & Biology

  • IdentificationSmall blenny with a rounded head and bushy, branched orbital tentacles. Body is greenish-brown to grey with darker vertical bars and a pattern of pale spots. Fringed tentacles above the eyes are prominent.
  • SizeUp to 12 cm total length, commonly 5 to 8 cm.
  • Social HabitSolitary and territorial. Occupies small holes and crevices in rocky substrate.
  • HabitatRocky intertidal and shallow subtidal zones, rock pools, and harbour walls.
  • Depth0 to 15 m, predominantly intertidal to 5 m.
  • Feeds OnAlgae and small invertebrates scraped from rock surfaces. One of the more herbivorous blennies.
  • DistributionEastern Atlantic from the Azores to West Africa, including the entire Mediterranean Sea.
  • DescriptionA characterful blenny with elaborate branching tentacles above its eyes, giving it a whiskered appearance. Common in rock pools and shallow rocky areas, it is one of the first fish many people encounter when snorkelling in the Mediterranean. Its inquisitive nature and habit of peeping from holes make it endearing.

Range

Habitat & Distribution

Found on rocky reefs, harbour walls, and artificial structures in shallow water across the Mediterranean and warm Atlantic. Common and widespread in suitable rocky habitat.

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

Prefers hard substrates with crevices in shallow water, including natural rocky reefs, breakwaters, and harbour infrastructure. Often seen perched on rocks with its head protruding from a hole.

Encounter Tips

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

Molly Miller species card

Biology

Behaviour & Diet

Feeding Strategy

Primarily herbivorous, feeding on algae and biofilm scraped from rock surfaces. Will also consume small invertebrates and detritus opportunistically.

Herbivorous grazer

Reproduction

Males establish and defend nesting cavities. Eggs are deposited on the cavity walls by visiting females and guarded by the male until hatching.

Cavity nester

Behaviour & Defence

Retreats head-first into rock holes when threatened. Its branching head tentacles may help break up its outline against the rocky backdrop.

Crevice retreat

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Where to Encounter in Malta

Dive sites where Scartella cristata may be encountered will be added as sighting data is collected.

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.

Source: IUCN Red List
diveshack Mediterranean Marine Life guide