Depth
Hippocampus · Bony Fish

Long-snouted Seahorse

Hippocampus guttulatus

1-20m
Depth Range
21cm
Max Size
Mediterranean
Distribution
1-20m
Depth Range
21cm
Max Size
Seagrass
Habitat
Carnivore
Diet
Paired
Social
NT
IUCN Status
Rare
Sighting Likelihood
Kingdom Animalia
Phylum Chordata
Class Actinopterygii
Genus Hippocampus
Species guttulatus

Bony Fish

Identification & Biology

  • IdentificationDistinctive horse-shaped head on an upright body covered in bony rings rather than scales. Long, tubular snout. Prehensile tail used to grip seagrass and other holdfasts. Variable colour from brown to green, yellow, or purple.
  • SizeUp to 21 cm total length, commonly 10 to 15 cm.
  • Social HabitMonogamous pairs maintain a bond throughout the breeding season. Males carry eggs in a brood pouch on the belly.
  • HabitatSeagrass beds, particularly Posidonia oceanica meadows. Also found among algae and around harbour structures.
  • Depth1 to 20 m, most common between 2 and 12 m.
  • Feeds OnTiny crustaceans and zooplankton sucked in through the tubular snout with a rapid head movement.
  • DistributionEastern Atlantic from the British Isles to Morocco, including the Mediterranean Sea.
  • DescriptionOne of two seahorse species in the Mediterranean, distinguished by its long snout and flowing mane-like coronet. Seahorses are among the most sought-after finds on Mediterranean dives. Males famously become pregnant, incubating eggs in a brood pouch and giving birth to fully formed miniature seahorses. Declining throughout its range due to habitat loss.

Range

Habitat & Distribution

Found in Posidonia oceanica seagrass meadows, sheltered bays and lagoons at depths from 1 to 20 metres. In Malta, it is an uncommon but treasured sighting in areas where healthy seagrass beds persist.

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 calm, sheltered waters with Posidonia seagrass, macroalgae or other holdfasts it can grip with its tail. Sometimes found on artificial structures, ropes and nets in harbours.

Encounter Tips

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

Long-snouted Seahorse species card

Biology

Behaviour & Diet

Feeding Strategy

A specialised suction feeder that draws in tiny crustaceans -- primarily mysid shrimp and amphipods -- through its tubular snout with a rapid snap of its jaw.

Suction Feeder

Reproduction

Males carry fertilised eggs in a specialised brood pouch, providing nutrients and oxygen until live young are released. This remarkable role reversal is unique among vertebrates.

Male Pregnancy

Behaviour & Defence

Relies almost entirely on camouflage, changing colour to match its surroundings. Its bony-plated body also makes it an unpalatable prey item for many predators.

Camouflage Expert

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Where to Encounter in Malta

Dive sites where Hippocampus guttulatus may be encountered will be added as sighting data is collected.

IUCN Red List Near Threatened

Conservation Status

This species is assessed as Near Threatened on the IUCN Red List. Mediterranean populations face ongoing pressure from fishing activity, habitat degradation, and climate-driven changes.

Source: IUCN Red List
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