Depth
Atherina · Bony Fish

Southern Sand Smelt

Atherina hepsetus

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 Atherina
Species hepsetus

Bony Fish

Identification & Biology

  • IdentificationSmall, slender fish with a silver body and a bright silver lateral band. Two separate dorsal fins. Larger and more robust than the big-scale sand smelt. Greenish back.
  • SizeUp to 20 cm total length, commonly 10 to 15 cm.
  • Social HabitHighly gregarious, forming dense schools near the surface in coastal waters.
  • HabitatCoastal surface waters, especially over sandy bottoms, around rocky shores, and in harbours.
  • DepthSurface to 20 m, predominantly in the first 5 m.
  • Feeds OnZooplankton, small crustaceans, and larval fish caught near the surface.
  • DistributionEastern Atlantic from the British Isles to Morocco, including the Mediterranean Sea.
  • DescriptionA common schooling fish of Mediterranean coastal waters, forming silvery clouds just below the surface. Schools attract predators from all directions, making them a key species in the nearshore food web. Very commonly encountered by snorkellers and shore 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.

Southern Sand Smelt species card

Biology

Behaviour & Diet

Feeding Strategy

Feeds on zooplankton, tiny crustaceans and insect larvae near the water surface and in the upper water column.

Planktivore

Reproduction

Adhesive eggs are attached to submerged vegetation or algae using filamentous threads. Spawns in spring and summer in shallow waters.

Egg layer

Behaviour & Defence

Transparent, silvery body is difficult to see against bright surface waters. Large schools provide collective protection through the confusion effect.

Schooling

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Where to Encounter in Malta

The following dive sites offer strong habitat match for Atherina hepsetus. 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