Can anyone I'd this

[samorton93]

Came on abit of rock it looks almost black

 

[Rybren]

Looks like sponges to me.

 

[4FordFamily]

Sponges I have the same species

 

[ahiggins]

+1 on sponges although theres so many...it would be terribly hard to narrow down to exact one

 

[samorton93]

Will it be okay in my reef ?

 

[KJ]

Will it be okay in my reef ?

Yes;)

 

[NewbieSeth]

Def sponges. Asked this same question with almost the exact same pics a few months ago on here. I had tons of them but they have slimmed down a lot. Only a few spots left. Def safe

 

[Salty1962]

Good part of your CUC.

 

[Maritimer]

Sponges filter your water - and they can filter a lot! I've been told that a one-gallon sized sponge can process the volume of an olympic swimming pool daily.

Don't go looking for cube-shaped trousers for 'em, though . . .

~Bruce