Weird Anenome

[kien]

Perhaps a corynactis anemone? They are generally harmless and don't proliferate like aiptasia.

[Borderjumper]

Ball tipped anemone?

[reefwars]

ball anemone , theyre cool dont kill it

[paddyob]

No ID is actually possible unless you post a picture.

It'd all speculation at this point.

Good luck.

[jtbadco]

From the description and the fact that I just found one myself last week I am pretty sure it is a Ball tipped nem. They are harmless. Prefer shaded areas

[Seriak]

Yup, once I looked at the pictures for ball tip anemones, I knew what it was. Thanks for your help.

[asylumdown]

I've got one in my tank as well. They often close completely during the day if they're in a bright spot. If you want it to grow you can try feeding it tiny pieces of mysis. There's a bunch of different species of ball tipped anemones, some are quite spectacular.