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Great Seahorse (Hippocampus kelloggi)

Find Great Seahorse across reef-livestock retailers and from fellow hobbyists on ReefDock. Compare sources, check live pricing where available, and review source-tank parameters on Reef-Trak-verified fish listings before you buy.

Great Seahorse
Photo: Show ryu · CC BY-SA 3.0
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Where to buy Great Seahorse

ReefDock searches the following reef retailers for this fish. Click through to see the live price.

  • Saltwaterfish

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    Search Saltwaterfish
  • Amazon

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  • Petco

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    Search Petco

About Great Seahorse

Hippocampus kelloggi is a medium-sized seahorse with a robust, fully-plated body typical of the Syngnathidae family. Coloration ranges from tan to brown or greenish, often with banding or mottling that provides camouflage in seagrass and kelp habitats. The prehensile tail is fully developed, and the dorsal fin is moderately tall.

Key facts

Origin
Eastern Pacific Ocean, primarily along the coasts of California, Mexico, and Central America. Found in shallow seagrass beds and kelp forests from the Gulf of California south to Peru.
Common Health Issues
Starvation from inability to compete for food, gas bubble disease, bacterial infection, parasitic copepods, head and tail rot
Max Size
7
Feeding Schedule
2-3 times daily
Appearance
Hippocampus kelloggi is a medium-sized seahorse with a robust, fully-plated body typical of the Syngnathidae family. Coloration ranges from tan to brown or greenish, often with banding or mottling that provides camouflage in seagrass and kelp habitats. The prehensile tail is fully developed, and the dorsal fin is moderately tall.
Min tank size
50 gallons
Family
Syngnathidae
Water Parameters
Temperature: 62-72°F pH: 8.1-8.3 Salinity: 1.02-1.025
Diet Details
Feed small live foods such as copepods, amphipods, and enriched frozen Mysis shrimp. Seahorses require frequent feeding of tiny prey items. Supplement with prepared seahorse diets if live copepods are unavailable.
Reef safety
Reef Safe
Difficulty Level
H. kelloggi is challenging to keep due to its specific dietary needs (live copepods and small frozen foods), susceptibility to poor water quality, and requirement for low-energy tank environments with stable cool temperatures. Not recommended for beginners.
Diet
carnivore

Looking for a hobbyist seller?

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Verify the source tank before you buy

ReefDock is the sister app to Reef Trak. Sellers who maintain a Reef Trak tank log can publish source-tank parameters on eligible fish listings — so you can see the conditions a fish was raised in before you buy. Log this fish on Reef Trak.

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