Reef Urchin — Echinometra mathaei
The Echinometra mathaei Reef Urchin is a small, reef-safe invertebrate with a rounded body covered in dense, dark spines that provide a striking addition to any aquarium. Slow-moving and peaceful, it grazes on algae, detritus, and biofilm across rockwork and substrate, helping maintain clean surfaces while contributing to a healthy reef ecosystem. Its natural behavior and unique texture make it both functional and visually interesting for hobbyists.
Reef Urchins thrive in established reef tanks with stable water parameters, moderate water flow, and plenty of surfaces for grazing. Introduce only to mature systems to ensure adequate food availability. A minimum tank size of 20 gallons is recommended to allow space for natural grazing and roaming behavior.
Their diet can be supplemented with algae-based foods from Julian Sprung’s Sea Veggies and finely powdered or pellet foods from San Francisco Bay Brand, Hikari, PE, TDO, and New Life Spectrum to maintain health and coloration. Target feeding encourages natural grazing behavior and active movement.
Approximate product size: 2"–3" (varies by availability)
We maintain a rigorous, veterinarian-approved quarantine program that includes proactive treatments, careful observation, and daily monitoring to ensure the highest standards of invertebrate health. Our biosecurity practices reduce the risk of any cross-contamination between systems, meaning our livestock are ready for your display tanks.