Unidentified growth on rock. Sponge or anemone?

[Evg07]

Hello, guys.

A couple of days ago I noticed a growth on one of my rocks. It's got a peculiar green color and I'm wondering if you guys could help me identify what am I dealing with.

I've had problems with Aiptasia on previous tanks and I just want to make sure I am not facing a dangerous hitchhiker here.

I'll show you some pics.

Thanks in advance.



I currently have:

2 ocellaris clowns

1 yellow tang

1 sailfin tang

1 lawnmower blenny

1 fighting conch

Assorted turbos and nassarius snails

Some soft corals

Torch coral

Hammer coral

Leather coral

200g tank

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[themagicman]

Sponge.

 

[Evg07]

Sponge.

Great, I was already planning on blasting some hot water to it, I guess I won't be necessary now.

Thank you, magic man.

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[Cdentata]

Any suggestions about the identity of this growth?
Thanks!

 

[Cdentata]

I am wondering about the discoloration on the rock. It started on the back portion of the rock and seems to be spreading.

 

[wvned]

Is it algae? It appears the same color as what's growing on the glass.
The yellow stuff?

 

[Cdentata]

Yes, It is the yellow stuff I am wondering about. I am still dealing with Bryopsis after more than a month.

 

[SantaMonica]

Can't see the pics but usually a bright yellow will be a sponge