Hairy creature

[SuncrestReef]

Any idea what this white hairy thing is on my rocks? It's really small (about 2mm across) but I got good close-up photos with my macro lens:

 

[Gareth elliott]

Pineapple sponge, harmless

 

[Ponraj A]

Any idea what this white hairy thing is on my rocks? It's really small (about 2mm across) but I got good close-up photos with my macro lens:

I think it’s a pine apple sponge...

 

[Paleozoic_reefer]

Pineapple sponge...you should be seeing many more as time goes one. They're harmless and aid in filtration.

 

[SuncrestReef]

Great! Thanks all.