What is this on my Frogspawn

[t.mehoves]

Two things in picture. What is the yellow on it, simply algae? More importantly, at least in my eyes right now, what is that alien mouth coming out?

 

[Crabs McJones]

Could be sponge or tunicate, hard to tell, any chance you can get a closer pic?

 

[I never finish anythi]

The thing at the bottom looks like a pineapple sponge.

 

[t.mehoves]

 

[Crabs McJones]

Sponges and ball anemone

 

[t.mehoves]

Thanks for the answer, been staring it at it for weeks and noticed it’s definitely getting bigger so thought I might need to ask. So both good or bad? Did quick research after identifying and seems both good?

 

[Crabs McJones]

Sponges are good, ball anemone are considered bad but they're harmless