The Greater Pipefish (Syngnathus acus) is a small marine (saltwater) fish in the Syngnathidae family of seahorses, pipefish, and seadragons. Acus means needle.
The Greater Pipefish looks like a thin, straight seahorse or a small sea snake. It is a long, tube-like, cyclindrical brown-coloured fish with a small mouth. Its snout (nose) is a long tube ending in a narrow mouth which opens upwards and is toothless. It has a dorsal (back) fin, which is always moving because it helps the Pipefish to swim. It has small gill openings, called slits, which enable it to breathe underwater.
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