yellow things around my tank

[imfsub12]

in my reef tank i have these yellow things on my rocks on some coral
they look like little yellow circliles that form this cool looking house for something
just have lots of them and wondering what they are

 

[imfsub12]

oh they look like eggs

 

[siptang]

maybe a sponge of sort... can you post some pics?

 

[imfsub12]

 

[imfsub12]

here

 

[imfsub12]

.

 

[siptang]

you posted double lol.
I'm 90% sure those are sponges.
I have purple and clear ones like that in my tank but my angel fish is keeping it in check.

 

[imfsub12]

ok
Are they good for the tank or do they take over.
double post ya not sure what hapened ..

 

[siptang]

Yes, those are good for the tank. If you have angels like me then natural fish food.

 

[1guydude]

natural filter feeders! This is a +