Odd bugish thing on my button polyps

[ushde]

I was checking out the button polyps because it's been looking rather drab lately..not opening and stuff..and I noticed these things crawling on the polyps. They look like little bugs with soft spikes on em..

Should I be worried about these things? I saw one walking over one of the polyps..and it started closing up....I've got several of these

 

[wade1]

At a guess they are a type of nudibranch that is feeding on them. See if you can pick some off and put them into a clear container/cup/dish and take another picture. If the polyps are receeding and looking bad, thats another indication that they are feeding on them.

Don't be too quick to ditch them, alot of people might pay for such critters!

Wade