What is it?

[TaylorS]

I've only had this live rock for about a month and the day after I put it in I noticed this small reddish-orange patch. It opens and closes reacting to light like an anemone. Is this a pest anemone or just the beginning of something good? It's also gotten a tad bigger with longer protrusions that have white dots on the end.

 

[joshkirkland83]

Looks like a ball nem. The pic is too blurry to say for sure.

 

[Anthony Wood]

I can't think of the exact name right now but it's a type of a pest anemone not an aptaisa a different type. Kill it with aptaisa x or a kalkwasser paste

 

[cloak]

+1 Ball-Tipped anemone.

http://www.advancedaquarist.com/2002/10/inverts

 

[TaylorS]

Here is when it's closed. I can't get a better quality because it's so small.