It seems everyone thinks it is a leather coral. Mine shrivels up and looks like he is going to die every 2-3 weeks or so.I've changed the water and he came back perfectly, and other times he shriveled up 1 or 2 days after a water change and did fine the next day. They just seem moody almost like it's Tuesday I'll have a tantrum and I'll be ok tomorrow. I don't know if this helps or not. Probably not