Dose anyone know what this is

[Sailfin23]

I found it in my sump is it good for my reef or no

 

[Crabs McJones]

Pineapple sponge harmless filter feeder. Very common to find in sumps and overflows

 

[P-Dub]

Exactly what Crabs said!

 

[Sailfin23]

Thanks guys