Is this a pest in between my zoanthids?

[Ser Davos]

Not sure what's this is.. Originally had some aiptasia on the rock it came on but I killed that using boiling water.

Full size:
http://imgur.com/Ap8EiTb

 

[CafeReef]

Almost looks like chaeto

 

[vadajo]

I cant tell but if its green maybe its bryopsis starting to grow

 

[Ser Davos]

I think you're right, it is bryopsis. Its starting to fan out like it. I tweezed most of it out but its starting to come back a little.

Thanks.

 

[Ser Davos]

Just an update, I was about to throw it out since I didnt want it spreading, and decided to try one more thing. I did a 5 minute dip in 50/50 water/peroxide, and that seems to have cleared it up.