Pin Cushion Urchin (Lytechinus variegatus)
The Pin Cushion Urchin is a small, hardy urchin with short, colorful spines that add texture and movement to your aquarium. Native to Caribbean and Florida reefs, it grazes on algae, biofilm, and detritus, helping maintain clean rockwork and sand. Peaceful and easy to care for, Pin Cushion Urchins thrive in established tanks with stable water conditions and plenty of surfaces to explore. Their compact size and striking appearance make them a charming addition to reef and fish-only setups.
Quick Facts
| Category | Detail |
|---|---|
| Care Level | Easy |
| Temperament | Peaceful |
| Maximum Size | ~2–3 inches |
| Minimum Tank Size | Not specified |
FAQ
What does the Pin Cushion Urchin eat?
The Pin Cushion Urchin grazes on algae, biofilm, and detritus, helping to keep your tank’s surfaces clean.
Is the Pin Cushion Urchin suitable for a reef tank?
Yes, it is well-suited for reef and fish-only setups due to its peaceful nature and ability to help control algae.
How big does the Pin Cushion Urchin grow?
It typically reaches a maximum size of about 2 to 3 inches.
Sophie Mills –
Added the Pin Cushion Urchin to my 20-gallon reef tank last month. It’s been active and cleaning the rocks nicely. The spines are colorful and it looks great in the tank. Very easy to maintain and doesn’t stress other inhabitants.
Lucas Dyer –
It’s a small but eye-catching addition. I noticed it’s eating algae on the sand and rock surfaces. Water parameters have stayed stable, and it seems happy in the setup.
Melanie Manning –
Perfect for a beginner reef tank. The urchin is peaceful and doesn’t interfere with fish. It’s been active for over a month and keeps the tank looking cleaner.