Nuisance anemone?

[Sexytang]

Ok the petstore gave me this little guy about 3 months ago and said it was a nuisance anemone and said they take over but it has doubled in size and I haven’t seen any others in the tank

 

[Sexytang]

 

[Kmadden]

Looks like a majano to me. I got one when I bought some GPS. The polyps wouldn't open near it because it was stinging them. I tried to remove it but was unsuccessful. I ended up poking at it until it curled up into the rock and sealed it in with super glue. GSP has since began to grow over the superglue.

 

[reef lover]

+1 majano

 

[ca1ore]

Maybe; would need a better picture. Majano is an imprecise term applied to a bunch of different anemones. The majano anemones I’ve had all stayed quite small, did not have green tips and reproduced like crazy (mostly by splitting).

Question for the OP would be whether the single anemone has grown or is it multiples clustered together? If the latter then it’s a problem regardless of the name.