Common name: Three-spot Seahorse

Scientific name: Hippocampus trimaculatus Leach, 1814
Longnose or Three-spot Seahorse (Hippocampus trimaculatus)Three-spot Seahorse hiding in the shadow of a stone
Three-spot Seahorses drifting in the water, Enoshima Aquarium, JapanSmall Three-spot Seahorse in aquarium

General Information

The Three-spot Seahorse, scientifically known as Hippocampus trimaculatus, is a unique and captivating species within the aquarium trade. Known for its distinct appearance, this seahorse is characterized by three prominent dark spots along its body, which serve as its namesake. This species is a fascinating addition to any aquarium due to its unusual shape and gentle demeanor.

In the wild, the Three-spot Seahorse is found in shallow coastal waters, often among seagrasses and mangroves. Its importance in the hobbyist community is notable, particularly for those interested in seahorse-specific aquariums. However, due to its specific care requirements, it is more suited for experienced aquarists dedicated to meeting its needs.

Details

Estimated price
Moderate
Recommended minimum tank volume
100 liter (26 gallons)
Salinity
S.G. 1.022 to 1.025
Temperature
24 to 26 °C (75 to 79 °F)
Acidity
pH 8 to 8.2
Average size
15 cm (6″)
Care level
Difficult
Diet
Carnivore Feeds on small crustaceans like mysis and brine shrimp
Social
Pair Best kept in pairs or small groups to mimic natural social structures
Reefsafe
Yes
Aggression
Peaceful
Captive bred
Yes Captive breeding efforts help reduce pressure on wild populations
CITES
Appendix II
IUCN Red List
EX
EW
CR
EN
VU
NT
LC

Taxonomy

  1. Kingdom
    Animals
    Animalia
  2. Phylum
    Chordates
    Chordata
  3. Class
    Ray-finned Fishes
    Actinopterygii
  4. Order
    Pipefishes
    Syngnathiformes
  5. Family
    Pipefishes
    Syngnathidae
  6. Genus
    Seahorse
    Hippocampus
  7. Species
    Three-spot Seahorse
    Hippocampus trimaculatus Leach, 1814
  8. Synonyms
    Hippocampus dahli Ogilby, 1908
    Hippocampus kampylotrachelos Bleeker, 1854
    Hippocampus lenis De Vis, 1908
    Hippocampus manadensis Bleeker, 1856
    Hippocampus mannulus Cantor, 1849
    Hippocampus planifrons Peters, 1877
    Hippocampus takakurae Tanaka, 1916
  9. Source: GBIF | Global Biodiversity Information Facility

Care

Caring for a Three-spot Seahorse requires a well-maintained aquarium that mimics its natural habitat. Seahorses are best kept in species-specific tanks to prevent competition for food and to ensure their unique swimming needs are met. A tank with a gentle water flow, plenty of hitching posts like artificial corals or seagrass, and a sandy substrate will provide an ideal environment.

Seahorses are sensitive to water quality, so regular monitoring and maintenance of water parameters are crucial. They thrive in tanks with stable temperatures and salinity levels, mimicking their natural environments.

Diet and Feeding

Three-spot Seahorses are carnivorous and primarily feed on small crustaceans in the wild. In captivity, they should be provided with a diet of live or frozen mysis shrimp, enriched brine shrimp, and other small crustaceans. Feeding should occur multiple times a day, as seahorses have small stomachs and require frequent meals to maintain their energy levels.

Behavior and Compatibility

Seahorses are known for their peaceful nature and can be kept with other non-aggressive species that do not compete for food. However, they are best housed with other seahorses or invertebrates like snails and shrimp that do not pose a threat. Their slow swimming and unique feeding habits make them incompatible with fast-moving or aggressive tank mates.

Reproduction

Three-spot Seahorses exhibit a fascinating reproductive behavior where males become pregnant. After a courtship dance, the female deposits eggs into the male's brood pouch, where he fertilizes and carries them until they hatch. Breeding in captivity can be challenging due to the specific conditions required for the fry's survival, including specialized feeding and rearing environments.

Health and Common Issues

Seahorses are susceptible to stress and water quality issues, which can lead to health problems like bacterial infections. Ensuring a clean, stable environment and a proper diet are key to maintaining their health. Regular observation for signs of illness, such as changes in color or behavior, is important for early intervention.

Habitat

The Three-spot Seahorse is native to the Indo-Pacific region, including the waters around India, Thailand, and the Philippines. They inhabit shallow coastal areas, often among seagrasses and coral reefs, where they can find ample food and protection. Their natural habitat is characterized by warm, tropical waters with abundant vegetation.

Conservation Status

Hippocampus trimaculatus is listed under CITES Appendix II, indicating that trade must be controlled to avoid utilization incompatible with their survival. Conservation efforts focus on habitat protection and sustainable trade practices to ensure the species' longevity in the wild. Ethical considerations for pet keeping include sourcing captive-bred individuals to reduce pressure on wild populations.