What is this "small anemone"?

[bwyoung]

I inherited a few of these on some rock from a friend. He thinks it is some type of anemone. I may agree, but it also looks a little zoa-like at times. It does each mysis shrimp and pulls in all the way.

Any thoughts? Thank you!

 

[chevster]

im guessing an Aiptasai... or a Zoanthid... but idk

 

[davocean]

Aptasia next to zoa, bad.

 

[bwyoung]

Thanks for the help. I have not seen aptasia that large, but now that I look at it I can see it. The "zoa" near the front does look significantly like the larger one - it is just pulled in some in that picture.

I will take a few closer pics tomorrow.

 

[garygb]

Yeah, definitely looks like an aiptasia to me.

 

[seafansar]

Yeah aptasia can get pretty big. I saw one that was 2.5" tall with tentacles about 2" long! It had been in the tank for years. The tank was not the best kept for sure.

 

[bwyoung]

<a href=showthread.php?s=&postid=12900232#post12900232 target=_blank>Originally posted</a> by garygb
Yeah, definitely looks like an aiptasia to me.

Are both of them aiptasia? If so, I will introduce them to my peppermint shrimp or just pull them out. They are on a small rock frag in my sump.

Thanks!