Seahorses

34 species

Seahorses are one of the most fascinating and unique creatures you can add to a saltwater aquarium. Belonging to the genus Hippocampus, seahorses are known for their horse-like head, prehensile tail, and upright swimming posture. Unlike most fish, seahorses are poor swimmers and rely on their dorsal fin to propel them and their pectoral fins for steering. Their prehensile tail allows them to anchor themselves to seagrasses, corals, and other substrates in the aquarium, which is essential given their weak swimming abilities.

Seahorses have a unique reproductive system where the males become pregnant. The female deposits her eggs into a specialized brood pouch on the male's abdomen, where he fertilizes and carries them until they hatch. This fascinating aspect of their biology makes them a captivating subject for observation and study.

Seahorses require specific care to thrive in captivity. They prefer a tank with low to moderate water flow and plenty of places to hitch their tails, such as live rock, artificial corals, or specially designed hitching posts. They are also sensitive to water quality, so maintaining pristine water conditions is crucial. Seahorses are carnivorous and primarily feed on small crustaceans like copepods and mysis shrimp. In captivity, they can be trained to eat frozen food, but this requires patience and consistency.

It's important to note that seahorses are susceptible to stress and disease, so they should be kept in a species-specific tank or with other peaceful, slow-moving fish. Avoid keeping them with aggressive or fast-moving species that may outcompete them for food.

Overall, seahorses can be a rewarding addition to a saltwater aquarium for experienced hobbyists who are prepared to meet their specific needs. Their unique appearance and behaviors make them a standout feature in any marine setup.

  1. Close up shot of a seahorse, Hippocampus abdominalis.
    Common name: Pot-bellied seahorse
    Scientific name: Hippocampus abdominalis
  2. Common name: west african seahorse
    Scientific name: Hippocampus algiricus
  3. Common name: Western spiny seahorse
    Scientific name: Hippocampus angustus
  4. Juvenile zebra snout seahorse - Hippocampus barbouri
    Common name: Barbour's seahorse
    Scientific name: Hippocampus barbouri
  5.  Pink pygmy seahorse in gorgonian seafan on coral reef - Hippocampus bargibanti
    Common name: Pygmy seahorse
    Scientific name: Hippocampus bargibanti
  6. seahorse (Hippocampus) swimming.
    Common name: spotted seahorse
    Scientific name: Hippocampus borboniensis
  7. The knobby seahorse - short-headed seahorse
    Common name: Short-head seahorse
    Scientific name: Hippocampus breviceps
  8. Common name: giraffe seahorse
    Scientific name: Hippocampus camelopardalis
  9. Common Seahorse.
    Common name: Cape seahorse
    Scientific name: Hippocampus capensis
  10. Beautiful Tiger Tail Seahorse on a tropical coral reef in Thailand
    Common name: Tiger Tail Seahorse
    Scientific name: Hippocampus comes
  11. Barbours seahorse swimming in sea by black background. Cute Hippocampus barbouri in aquarium, side view
    Common name: horned seahorse
    Scientific name: Hippocampus coronatus
  12. Denise's pygmy seahorse (Hippocampus denise). Underwater macro photography from Romblon, Philippines
    Common name: Denise's pygmy seahorse
    Scientific name: Hippocampus denise
  13. Lined seahorse Hippocampus erectus clings to a strand of seaweed.
    Common name: lined seahorse
    Scientific name: Hippocampus erectus
  14. Hawaiian Pelagic Seahorse
    Common name: spotted seahorse
    Scientific name: Hippocampus fisheri
  15. Sea Pony attached to a marine plant
    Common name: Sea Pony
    Scientific name: Hippocampus fuscus
  16. Long-snouted Seahorse (Hippocampus guttulatus) in Adriatic sea, Croatia
    Common name: Long-snouted Seahorse
    Scientific name: Hippocampus guttulatus
  17. Short-snouted Seahorse (Hippocampus hippocampus) on the seabed
    Common name: Short-snouted Seahorse
    Scientific name: Hippocampus hippocampus
  18. Thorny Seahorse - Hippocampus histrix. Underwater macro world of Tulamben, Bali, Indonesia.
    Common name: Thorny seahorse
    Scientific name: Hippocampus histrix
  19. Hedgehog seahorse (hippocampus spinosissimus) macro photo taken in Malapascua island, Cebu Philippines
    Common name: Pacific seahorse
    Scientific name: Hippocampus ingens
  20. Hippocampus jayakari EG-138....
    Common name: Jayakar's seahorse
    Scientific name: Hippocampus jayakari
  21. Great seahorse in IOP, Izu
    Common name: Great seahorse
    Scientific name: Hippocampus kelloggi
  22. Estuary Seahorse (Hippocampus kuda) from the indo-pacific ocean
    Common name: Yellow Seahorse
    Scientific name: Hippocampus kuda
  23. Common name: Lichtenstein's Seahorse
    Scientific name: Hippocampus lichtensteinii
  24. Common name: Bullneck seahorse
    Scientific name: Hippocampus minotaur
  25. Japanese Ocean
    Common name: Japanese seahorse
    Scientific name: Hippocampus mohnikei
  26. Beautiful view of yellow longsnout seahorse (hippocampus reidi)
    Common name: Slender seahorse
    Scientific name: Hippocampus reidi
  27. Sea star crown of thorns
    Common name: crowned seahorse
    Scientific name: Hippocampus sindonis
  28. Queensland Seahorse Hippocampus spinosissimus
    Common name: Hedgehog seahorse
    Scientific name: Hippocampus spinosissimus
  29. Tiger snout seahorse West Australian seahorse
    Common name: West Australian seahorse
    Scientific name: Hippocampus subelongatus
  30. Longnose or Three-spot Seahorse (Hippocampus trimaculatus)
    Common name: Three-spot Seahorse
    Scientific name: Hippocampus trimaculatus
  31. White's Seahorse Hippocampus whitei, White's Seepferdchen in Sydney, Australia
    Common name: White's seahorse
    Scientific name: Hippocampus whitei
  32. Juvenile zebra snout seahorse - Hippocampus barbouri
    Common name: Zebra seahorse
    Scientific name: Hippocampus zebra
  33. Dwarf Seahorse
    Common name: little seahorse
    Scientific name: Hippocampus zosterae
  34. Colorful Weedy Seadragon Fish Oahu Hawaii
    Common name: Weedy seadragon
    Scientific name: Phyllopteryx taeniolatus