Exactly what it is. I got some new ZOOs recently and I got 2 of these guys from a coral dip...really bad news. I actually put the 2 in a vial, and the next morning one of them layed eggs. Be careful, some can change color to the zoos when it eats it to match. Use tweezers to remove them. NOT BY HAND. I read a horror story about someone getting it by hand and the toxin sent them to the hospital.