HomeFish encyclopediaRay-finned fishesPipefishes and SeahorsesPipefishes and seahorsesLongsnout seahorse Longsnout seahorse (Hippocampus reidi) Scientific name: Hippocampus reidi Ginsburg, 1933 The Longsnout seahorse (Hippocampus reidi) is a brackish-water fish of the family Syngnathidae. BiologyUncommon in most areas, but may be locally common in certain places. Usually attached to gorgonians or seagrasses but may occur in floating Sargassum or swimming freely in midwater. Ovoviviparous. The male carries the eggs in a brood pouch which is found under the tail. Has been reared in captivity. Length type refers to Height (= from top of coronet to the tip of straightened tail).Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameHippocampus reidiFamilySyngnathidae (Pipefishes and seahorses)OrderSyngnathiformes (Pipefishes and Seahorses)ClassActinopterygii (Ray-finned fishes)Maximum length17.5Depth range0–55 m (0–180 ft)EnvironmentMarine; brackish; reef-associated; non-migratory; depth range 0 - 55 mClimateSubtropicalDistributionWestern Atlantic: North Carolina in USA, Bermuda and Bahamas to Santa Catarina, Brazil. International trade is monitored through a licensing system (CITES II, since 5.15.04) and a minimum size of 10 cm applies.Conservation status (IUCN)Data deficient (DD)Threat to humansHarmlessUsesFisheries: minor commercialResilienceMedium, minimum population doubling time 1.4 - 4.4 years (Assuming annual Fec SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026