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Hedgehog Seahorse (Hippocampus spinosissimus)

Find Hedgehog 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.

Hedgehog Seahorse
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Where to buy Hedgehog Seahorse

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

  • Saltwaterfish

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  • Amazon

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  • Petco

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About Hedgehog Seahorse

A small seahorse with a relatively sturdy, spiny body covered in bony plates and horn-like protrusions along the head and trunk, giving it a "hedgehog-like" appearance. Coloration ranges from brown to yellow to reddish, often with lighter bands or mottling. Adults typically reach 5–7 inches in length.

Key facts

Temperament
Peaceful
Common Health Issues
Starvation if not fed frequent small meals, bacterial infections, deterioration from water-quality fluctuations, parasitic infestations
Appearance
A small seahorse with a relatively sturdy, spiny body covered in bony plates and horn-like protrusions along the head and trunk, giving it a "hedgehog-like" appearance. Coloration ranges from brown to yellow to reddish, often with lighter bands or mottling. Adults typically reach 5–7 inches in length.
Reef safety
Reef Safe
Diet Details
Feed small live or frozen foods such as copepods, amphipods, mysis shrimp, and enriched brine shrimp. Multiple small feedings per day are necessary to meet the seahorse's metabolic needs in captivity.
Origin
Indo-Pacific region, including the Philippines, Indonesia, and surrounding areas. Found in seagrass beds and shallow coral reef environments.
Care Level
Hard
Family
Syngnathidae
Min tank size
30 gallons
Difficulty Level
This species is challenging for most aquarists. Hedgehog seahorses require stable water parameters, frequent small feedings of live or high-quality frozen foods, low-flow environments, and careful tank mates that will not compete for food or harass them. They are not recommended for beginner hobbyists.
Diet
carnivore
Water Parameters
Temperature: 72-78°F pH: 8.1-8.3 Salinity: 1.02-1.025

Looking for a hobbyist seller?

ReefDock's marketplace lets reef-keepers sell fish directly to other reef-keepers with Stripe-secured checkout and live-arrival photo confirmation. Browse current fish listings on ReefDock, or list your own.

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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