Can anyone verify for me that this is a Strawberry Anemone? I also need to know if they are harmful to my soft corals, because they are spreading.

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This is a picture of another one...

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90% sure, touch it. if it has a skeleton, it is a Large Polyped Stony, if it doesn't have a skeleton, and a red pedal disk, it's a Corynactis Californica, Strawberry nem.

They are a tropical relative of strawberry anemones - Corynactis or Pseudocorynactis sp.

They do sting, but aren't invasive like Aiptasia, and people don't usually have problems with them. If they get really big they can eat fish, but I don't think that's the species you have. How big are they now?

edit: for clarification, strawberries are a coldwater species. If this is a topical tank, it is impossible that these are C. californica. They cannot survive in warm water.

ball anemones. harmless. non-photosynthic. split rapidly. dont sting hard enough to kill

Yeah, I really don't want to touch it & they are only 3/4 of an inch spread out.

I've had my tank set up going on 15 months & 1st dicovered one a few months back; now there are about a dozen on the backs & underneath my rocks. And, yes, I have a tropical tank that stays 77-78 degrees.

Oh & thanks for the fast replys!

ball anemones yeah they spead like crazy...and love the real low light areas...i tried burning them but they still come back?

ohhh! It is hard to scale according to a pic. (embarrassed)

It is like Nanobuds said, A Ball Anemone.

OK so I have ball anemones that will stay in low light areas, hopefully. I am planning to start up a new tank in a month or so, should I try to get these guys off my rocks or just leave them be?

Could they possibly be a big pest? I guess I need to go do some research....

leave them be. they are awesome and harmles, and i would defiantly buy them if they were usually sold at a LFS