HomeFish encyclopediaRay-finned fishesPipefishes and SeahorsesPipefishes and seahorsesStraightnose pipefish Straightnose pipefish (Nerophis ophidion) Scientific name: Nerophis ophidion Linnaeus, 1758 The Straightnose pipefish (Nerophis ophidion) is a brackish-water fish of the family Syngnathidae. Native range: Eastern Atlantic, Norway to Morocco (excluding region from Denmark to Netherlands), also throughout the Mediterranean and the Black Sea. BiologyAnal and pectoral fin absent. Anal opening below front end of the dorsal fin, 28-33 body rings. Has a strait snout.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameNerophis ophidionFamilySyngnathidae (Pipefishes and seahorses)OrderSyngnathiformes (Pipefishes and Seahorses)ClassActinopterygii (Ray-finned fishes)Maximum length29.0Depth range2–15 m (7–49 ft)EnvironmentMarine; brackish; demersal; depth range 2 - 15 mClimateTemperateDistributionEastern Atlantic: Norway to Morocco (excluding region from Denmark to Netherlands), also throughout the Mediterranean and the Black Sea.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesFisheries: of no interestResilienceHigh, minimum population doubling time less than 15 months (K=1.05) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026