The Syngnathiformes are an order of ray-finned fishes that includes the pipefishes and seahorses. These fishes have elongated, narrow, bodies surrounded by a series of bony rings, and small, tubular mouths. The shape of their mouth—in at least syngnathids—allows for the ingestion of prey at close range via suction. Several groups of Syngnathiformes live among seaweed and swim with their bodies aligned vertically, to blend in with the stems.

Syngnathiformes. Retrieved May, 08 2021, from en.wikipedia.org/wiki/Syngnathiformes.