Invertebrates
Long-Spine Sea Urchin.
A striking reef invertebrate with a small central body and a dramatic halo of long, needle-thin spines. Long-spine urchins are excellent algae grazers that roam the rockwork keeping surfaces clean. Their sharp spines make them a bold living accent and a natural deterrent in the tank.
We keep this species at our Erie store. Come and see it in the tanks, or call (814) 456-9445 and ask what we have in right now.
Sea Cave keeps this species. You will find these in the tanks at 660 East 14th Street in Erie. We never ship live animals.
- Condition
- new
- Fulfillment
- Local pickup — Erie, PA
We never ship fish, coral, or invertebrates — every animal here is one you meet in person. Each one is acclimated and health-checked in-house before it goes out into the display tanks. This is a species we keep, and what is swimming on any given day changes with the deliveries, so please call (814) 456-9445 before you drive in.
Care at a glance
What to know before you take one home.
- Care level
- Intermediate
- Temperament
- Peaceful
- Community
- Community safe
- Adult size
- 4"
- Min tank size
- 30 gallons
- Diet
- Herbivore
- Scientific name
- Diadema setosum
Good tank mates
Peaceful with fish and most tankmates, though its long spines can be hazardous to handlers and it may bump or dislodge unsecured corals as it grazes.
Good to know
Its long spines can pivot toward a shadow or threat, and it uses them along with tube feet to slowly wander the reef at night.
What is in the tanks and each animal's temperament vary — call (814) 456-9445 for pairing advice.
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Visit the store
660 East 14th Street,
Erie, PA.
Mon–Fri 12–6 · Sat 11–4 · Sun closed. Call ahead on livestock — what's on the floor rotates.