What is this?

[Thinslis]

I have a few of these on this rock, is it an aptasia?

 

[laskopyre]

It's pretty hard to tell what they are. Do you have a closer or bigger pic?

 

[acer]

Do you mean the brown polyp? - Need to get a pic when it is open, etc. - Atips have longer tentacles and are not usually brown. This is probable a Zoa of some sort. Hard to tell from the pic.

 

[matt_trace]

looks like a zoa to me to

 

[Thinslis]

It looks like the closed ones in this picture.

http://images.google.com/imgres?img...button+polps&ndsp=20&hl=en&sa=N&start=40&um=1

 

[DonDon1]

Palythoa