A LFS had 2 of them in their tank. They had little algea and sold him to me at a good price since. They said they had another one somewhere, but they couldn't find him in the tank while I was there.

He was worth every cent he will climb over everything and eat any algea he can get to.

I read up on them and know that they can "ink" like that of a squid, but so far everything I read about them says they are not harmful, just a distasteful ink.

I have a sea cucumber, but he stays in his little area around a rock and rarely moves out so I was in need of a grazer, if you have a good supply of algea I would recommend getting one.