id sponge?

So I’ve had these little orange and yellow balls growling in one of my caves on the bottom and it was just a tiny spot but it’s moving towards my rock work. I was thinking maybe sponge since it’s not getting any light but it glows under blue light. I couldn’t find my UV penlight so all I have is...

it wasn’t this big when i got it. it just kept growing more and more till it got to this size. and to be completely honest, i kind of like it and would probs prefer it to be on its own with no zoas.

A few months ago, I noticed a yellow mass growing on rock behind a coral. After a recent water change the mass suddenly expanded, forming, an approximately 3-4 X 1 inch column (picture attached). This is not the first time a yellow growth has appeared in this tank. When first established...

Hi can someone ID this for me think it’s a type of sponge not sure if it’s good or bad but it’s a fast grower.. Thanks for any information.