Hitchhiker crabs: Let 'em be or kill 'em?

[EmilyB]

Crabs are usually opportunistic, but I still really like them.

The only crab in my reef however is a decorator crab the size of a softball. They pull up the odd zoo and polyp but nothing that is of a concern to me. It certainly is a horrific site by flashlight and I just love her.

http://www.wetwebmedia.com/marine/in...swcrabfaqs.htm