Brian - I've seen one of those in my tank also.
How did you catch it?
jezzeaepi - I have not seen any thing hurting my TBS coral except the lights! They bleach easy under T5HO. I've actually lost a couple and I'm trying to move them down lower in the tank but not sure if this will help. Anyone else having this problem? I have zoo's, frogspawn and some green polyp toadstools close to the TBS coral and so far no stinging problems that I can see.
Jay