Hi, I just discovered a few of these in my tank. This one is less than 1/4 inch in diameter. Others a bit smaller. Appears transluscent, almost transparent, and gelatinous, maybe anemone-like. Shape tends toward round or ellipse. Has flourescent green dots or tiny tentacles. Sorry, this is about the best pic I can muster. They reside under the rock (the purple in this pic) against the sand bed in the middle of my tank. TIA!




