Is a seahorse a fish? Yes, despite their oddball appearances, seahorses are indeed fish. They belong to the genus Hippocampus and are classified within the Syngnathidae family, which also includes pipefish and sea dragons.

Like other fish, they have gills, a swim bladder, and fins—even if their small pectoral fins and upright posture make them look more like animated chess pieces than typical fish.

Seahorses evolved to thrive in specific marine habitats, from coral reefs to shallow seagrass beds in temperate and tropical waters.

How Many Species of Seahorse Are There?

There are over 45 known seahorse species, including the spiny seahorse, short snouted seahorse, common seahorse, long-snout seahorse, and Pacific seahorse ( Hippocampus ingens ).

Each has adaptations that help the

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