I have a few of these anemones on a piece of live rock. They seem to be multiplying so I am starting to get concerned. THey are very tiny right now. They have a pinkish base and translucent tentacles that end in a white bulb. They seem to be able to extend the tentacles pretty far. My peppermints avoid them and I actually saw one get stung by one today. Its in the center of the picture.