Short-snouted seahorse
A small seahorse found in the Mediterranean and northeastern Atlantic.
The short-snouted seahorse (Hippocampus hippocampus) belongs to the Syngnathidae family. It lives only in the Mediterranean Sea and parts of the North Atlantic, mainly near Italy, Portugal, Spain, and the Canary Islands, with smaller groups reaching from the Atlantic into the North Sea. It prefers shallow, muddy waters, estuaries, and seagrass beds.
In the UK, this species is protected under the Wildlife and Countryside Act 1981. Two of England’s 27 Marine Conservation Zones were created specifically to safeguard short-snouted seahorse populations and their habitats. In 2010, London Zoo’s breeding programme produced 918 babies. Regionally, the species is classified as Near Threatened in the Mediterranean and Data Deficient in Croatia. In Europe, it is usually caught as bycatch and sold as curios; in Spain and Portugal, some live animals are collected under licence for aquariums. In West Africa, it appears as bycatch more often than in Europe. The species is listed on CITES Appendix II, like all seahorses, but trade numbers are unclear due to misidentification—in one shipment, H. hippocampus was labelled as another species. Few trade records exist from its native western Atlantic/Mediterranean region, while many exports from the Indo-Pacific are either misidentified or re-exports lacking proper certificates. Other listings include the Barcelona Convention Annex II, OSPAR Convention Annex V, and the Bern Convention Appendix II.
These seahorses typically rest on rocky bottoms, in seaweed, or at the edges of seagrass beds in shallow, muddy water, no deeper than 77 metres. Their home range is very small because they move little day to day. Most movement happens during storms, when currents carry them or they drift while clinging to floating debris. In winter, they shift to deeper water to avoid rough seas. They anchor themselves to plant stems with their tails and are excellent at camouflage. The species appears in the northeastern Atlantic from northwestern Scotland and the Netherlands south to Senegal, and into the Mediterranean, including the Azores, Madeira, and the Canary Islands. In Britain and Ireland, its distribution is shaped by the Gulf Stream’s warmer waters, which boost plankton productivity, so both this species and the long-snouted seahorse are mostly found on southern and western coasts.
Quick Facts
- Taxon
- Hippocampus hippocampus
Facts from the source article.
Lore & Background
Hippocampus hippocampus has a prominent spine above each eye and a short, upturned snout about one-third the length of its head. Its body can be black, purple, orange, or brown, with bony tubercles giving an angular appearance. The tail is semi-flexible and used to anchor to plants or coral, and also during greeting and mating. It is an ambush predator, feeding on live moving food by sucking it into its gut, lacking teeth and a stomach.
Reproduction involves the female depositing eggs into the male's brood pouch, where they are fertilized and incubated. Pregnancy lasts 20–21 days, and the male gives birth to 50–100 young, with older males producing more offspring. Males exhibit aggressive courtship behaviors including snapping and wrestling. Pairs are faithful, with synchronized reproductive states and daily greetings lasting six to eight minutes.
In the United Kingdom, the species is protected under the Wildlife and Countryside Act 1981, and two Marine Conservation Zones were designated to protect its populations. It is listed on CITES Appendix II, the Barcelona Convention Annex II, OSPAR Convention Annex V, and the Bern Convention Appendix II. Regionally, it is classified as Near Threatened in the Mediterranean and Data Deficient in Croatia.
Reader's Guide
The short-snouted seahorse is notable for its restricted home range and limited daily movements, with most displacement occurring during storms when individuals are carried by currents or on floating debris. In winter, they move into deeper water to escape rough seas. Their distribution in Britain and Ireland is influenced by the warmer waters of the Gulf Stream, which creates conditions for higher plankton productivity, and in 2007 colonies were discovered in the River Thames around London and Southend-on-Sea.
In Italy, the species is found on the entire coast, primarily in the Sicily, Sardinia, Ionian, and Tyrrhenian seas, with a gap in habitat suitability from the northern coast of Abruzzo to Emilia Romagna. The regions with the highest suitable areas are Sicily, Sardinia, Apulia, Calabria, Tuscany, and Campania. The species is often caught as bycatch in Europe and sold as curios, and live animals are collected under licence in Spain and Portugal for aquaria. In West Africa, it is more common as bycatch than in Europe. Trade is masked by misidentification, with some shipments listed as other species, and many exports from the Indo-Pacific are either misidentifications or re-exports without proper certificates.
Did You Know?
- The short-snouted seahorse can grow up to 15 centimetres (5.9 in) long.
- Males give birth after a pregnancy lasting 20–21 days, producing 50 to 100 young.
- The species is listed on CITES Appendix II, but trade is masked by misidentification.
More in Seahorses and Pipefish, Part 2 1-24
Spotted an error? Know more?
Reader corrections go straight into our review queue. Suggest an edit · How this site is sourced