So when I was in Australia this Christmas We were chilling at a beach when I decided to go check out some rock pools, guess what I found! underwater cps! not like the waterwheel guys or bladder worts like drosera but underwater without dew and faster, also loose the tentacle so just arms. Sorry no pics I lost my camera when we got here . does anyone know what these are, I"m guessing they were salt water, we were by the ocean. and some were red and some were greenish. Oh yeah and they curled around their victims fast and the prey gets pushed somewhere into them 'cause like a minute later the food would be gone and they would be ready to eat again. Please does anyone know what these are and where I cud get them they are really very awesome!!

I think it's probably Sea anemone that you are thinking of. These are not plants, but animals and they are pretty cool - we used to play with them as kids.

http://en.wikipedia.org/wiki/Sea_anemone