Looks like a math urchin. Rock boring species that chews a burrow into rock. Eat macroalgae and pellets, probably won't do much to the coraline.
http://www.scuba-equipment-usa.com/m..._mathaei).html
__________________
-- Tony
My next hobby will be flooding my basement while repeatedly banging my head against a brick wall and tearing up $100 bills. Whee!
|