Favia, cloudy stuff...

[ReefRoss86]

Hi everybody,

I've had this Favia around 3 months now, it's been doing fine but around two weeks ago I noticed this strange cloudy stuff below it and it's sweeper tentacles barely come out now, even at night time. My tank parameters are all within normal ranges and I have a Duncan, a Torch and various zoas all doing good. If you zoom in you can see veiny lines running through it. Can anybody help tell what this is and should I be worried about it?

 

[kharmaguru]

The stuff below it is a sponge. Normally they are beneficial and a sign of mature rock however there are predatory carnivorous sponges. I would say it is in the harmless filter feeder group but I'm not a sponge expert.. Maybe someone else will chime in.

 

[ReefRoss86]

Hopefully it will be in the harmless group!

Thanks for the quick response Kharmaguru.