Strawberry Anemone
Scientific name: Corynactis californica

Does anybody have these in their warm-water tank?
I know Steve has one in his cold water tank and from what I understand, this is a cold-water anemone.

I actually realized what I had after reading about steve's tanks.
It came on the bottom side of a mushroom rock as a hitch-hiker. I noticed it a few months ago while aquascaping. It is just a single anemone the size of a dime.

Any thoughts? Should I leave it in the tank or pull it?

Here's a picture of the creature: (not my tank)