ReefDock
MarketplaceSellHow it worksFAQ
  1. Home
  2. /Shop
  3. /Livestock
  4. /Fish
  5. /Thorny Seahorse

Thorny Seahorse (Hippocampus histrix)

Find Thorny 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.

Thorny Seahorse
Photo: Rickard Zerpe · CC BY-SA 2.0
Some retailer links may earn ReefDock a small commission at no extra cost to you. Learn more.

Where to buy Thorny Seahorse

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

  • Saltwaterfish

    Search this retailer

    Search Saltwaterfish
  • Amazon

    Search this retailer

    Search Amazon
  • Petco

    Search this retailer

    Search Petco

About Thorny Seahorse

The Thorny Seahorse has a slender, upright body with a curled prehensile tail characteristic of seahorses. It displays prominent thorn-like tubercles (bony protrusions) covering its body, giving it its common name. Coloration ranges from yellowish-brown to reddish-brown, often with darker mottling or banding.

Key facts

Aka
Thorny Seahorse
Min tank size
30 gallons
Reef safety
Reef Safe
Appearance
The Thorny Seahorse has a slender, upright body with a curled prehensile tail characteristic of seahorses. It displays prominent thorn-like tubercles (bony protrusions) covering its body, giving it its common name. Coloration ranges from yellowish-brown to reddish-brown, often with darker mottling or banding.
Temperament
Peaceful
Care Level
Hard
Difficulty Level
Advanced - Requires experienced care due to sensitive nature specific habitat needs or complex dietary requirements. Best for expert aquarists.
Care Requirements
• Minimum 30 gallon tank with dense seagrass or macro algae for anchoring • Temperature range 72–78°F; maintain stable conditions with minimal flow in the holding area • Salinity 1.020–1.025 specific gravity • Feed 2–3 times daily with live copepods, amphipods, and enriched frozen mysis shrimp • Keep with peaceful tank mates only; seahorses are slow feeders and easily stressed by aggressive or fast-moving fish • Provide calm areas with reduced water flow where the seahorse can feed undisturbed
Water Parameters
Temperature: 72-78°F pH: 8.1-8.3 Salinity: 1.02-1.025
Family
Syngnathidae
Feeding Schedule
2-3 times daily
Common Health Issues
Poor feeding in new tanks, gas bubble disease, bacterial infections, parasitic copepods

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.

Related fish

  • Acares Midget Reef Chromis

    Chromis acares

  • Achilles Tang

    Acanthurus achilles

  • Adorned Wrasse

    Halichoeres cosmetus

  • African Basslet

    Liopropoma africanum

  • African Pygmy Angelfish

    Centropyge acanthops

  • Agile Chromis

    Chromis agilis

  • Aiptasia Eating Filefish

    Acreichthys tomentosus

  • Allard's Clownfish

    Amphiprion allardi

ReefDock

The reef marketplace built around live-arrival accountability. Sister app to Reef Trak.

Questions? support@reeftrak.com

Marketplace

  • Browse all listings
  • Auctions
  • Trades
  • Sell on ReefDock

Categories

  • Corals
  • Fish
  • Invertebrates
  • Equipment
  • Frags

About

  • How it works
  • Fees and payouts
  • About ReefDock
  • FAQ
  • ReefTrak integration
  • Marketplace rules
  • Affiliate disclosure

© 2026 ReefDock · Privacy · Terms