Seahorse

Seahorses are small marine fish in the genus Hippocampus, known for their horse-like heads, upright swimming posture, and curled prehensile tails.

Seahorses are small marine fish in the genus Hippocampus, known for their horse-like heads, upright swimming posture, and curled prehensile tails. They live in shallow coastal habitats in temperate and tropical waters and are found in a range of species with varying conservation status. Although most species live in warmer waters, seahorses are relevant to Canadian marine biodiversity through public aquariums, marine education, and conservation discussions about coastal species and habitat protection.

Taxonomy and classification

Seahorses belong to the genus Hippocampus in the family Syngnathidae, which also includes pipefishes and seadragons. They are marine ray-finned fish in the broader group of bony fish. There are more than 40 known seahorse species, with counts varying by source and taxonomic treatment.

Physical characteristics

Seahorses are named for their horse-like heads and have upright bodies, tubular snouts, and curled prehensile tails. Their bodies are covered by bony plates rather than scales. They use their curled tail to grip vegetation and other objects.

Habitat and distribution

Seahorses live in shallow coastal waters in temperate and tropical regions worldwide. Common habitats include seagrass beds, mangroves, estuaries, coral reefs, and other sheltered areas.

Diet and behaviour

Seahorses are carnivores that eat small crustaceans and other tiny invertebrates. They are generally poor swimmers and often rely on camouflage and their tails to anchor themselves in vegetation.

Conservation

Conservation assessments vary by species, and several seahorses are listed as threatened or data deficient. Habitat loss, bycatch, and trade are commonly cited pressures on seahorse populations.