Help me identify this yellow spongy thing

[biosysmd]

Anyone can tell me what this is? Found in my sump. Seems to be getting bigger. Should I be worried? Or should I keep?

Looks the same as the sponge that you wash dishes with.

Is this sponge bob?

 

[Tired]

Looks like a sponge. Generally harmless unless growing over the tops of corals. Neat one you've got there.

 

[fishguy242]

LOL...looks like extra filtration to me...
@Erin1971Texas ?

 

[EeyoreIsMySpiritAnimal]

Folks really need to use the collections of info already compiled...

What is that!! A R2R guide to common new tank hitchhikers.

One of the greatest things about starting a reef tank is getting your live rock in and admiring all the diversity within it. The rock comes to life different creatures. This is a guide that I, along with a very well known critter identifier @KJ , have put together for the new reefer on what...

www.reef2reef.com