need an ID

Ive seen 2 of these on the same rock, they are real tiny, so its hard to get a good pic of them.

 

I recently noticed similar creatures in my tank. Mine are more white than yours, though. All I can comment on is the obvious: radial symetry, single body cavity, and presence of tentacles marks this as an anemone or single coral polyp.
Is it as large as a grain of rice, or bigger?

 

a ployp, brown on the outside and a green in the middle, I have many of these

 

They are about 1/4" around, there is only 2 of them, and they are far apart. Nothing in the tank is similar to them. They also react to light.

 

I think it's a Majano or Tulip anemone. Go to the picture halfway down this page at wetwebmedia and see what you think.
AnemIDFAQ9

 

nope, its not a majano. Ive seen tanks taken over by them, I am positive its not them.

 

It a button polyp. They are a very common hitch hiker. Nice score

J

 

the rock has been in my tank for 3 years and there is only 2 of them. They have spread at all. If it was button polyps, I'd think they would have spread by now, ya know or atleast grown a little. They look like the green and brown palys that are common but a heck of a lot smaller.

 

I'm going with a button polyp too. I've had them before and they don't spread like wildfire like some polyps do.

 

I agree...I think it's a paly too. Palys have separate "stalks" as zoos share a common base. There is another term for base, and I cannot pronounce it much less spell it. Palys are zoos, but not all zoos are palys.