Urchin ID Help Please

[spit.fire]

Originally Posted by SeaHorse_Fanatic

Yup, Tyler is correct. I've had a couple of those over the years. Never seemed to harm anything. Hard to remove from its burrow though. Jams itself into the hole with thick spikes sticking out to make manual removal near impossible until it decides to move and let go.

i actually buy those occasionally, i used to have 6 or 7 in my system (before my tank crash)