What kind of slug is this

[ssparker]

Hello I just wanted to know what kind of slug this is and if its a good or bad sulg to have. Thanks

 

[greenbean36191]

It's hard to tell from such a small pic, but it's probably Tritoniopsis elegans. They're predators of leathers.

 

[ssparker]

Thanks for the fast reply and your right thats what it is. I looked it up and it says they kill soft corals. They killed one of mine so far and started to work on another one. So all I know to do is just pick them out when I see them. And thanks again for the quick reply.