so ive had my long spined urchin for 3 yrs now. Never ate corals i added a new one and he ate it overnite. IS it ok to just put him in my sump or will he eat my mangroves and caulerpa?
I am confused because I have not seen anything that would point to a long spined urchin Diadema sp.eating coral. Are you sure it was the urchin, or maybe it was eating some algae around the coral?