new thingy ID'd

[LovenBama]

my question now is ...will they spread like weeds or what?
http://www.reefcentral.com/forums/showthread.php?t=1761614

 

[Tomoko Schum]

The sponge seems to stay in dimly lit or dark areas with strong currents in my system. They are all over my sump and inside overfllow boxes but not in my display tank or refugium.