JHiestand Posted January 19, 2012 Share Posted January 19, 2012 I have this weird spot on my rocks, just wondering what it could be? Thanks for any help. John Link to comment Share on other sites More sharing options...
NoobtoSalt Posted January 19, 2012 Share Posted January 19, 2012 Looks like a black sponge. Link to comment Share on other sites More sharing options...
NoobtoSalt Posted January 19, 2012 Share Posted January 19, 2012 welcome to the forum btw. Link to comment Share on other sites More sharing options...
Saltfinsax Posted January 19, 2012 Share Posted January 19, 2012 Yep sponge. Black or blue but allways nice to see grow. Link to comment Share on other sites More sharing options...
nelsz3 Posted January 19, 2012 Share Posted January 19, 2012 welcome to the forum:D how long have you had the rock? it looks like it could be sponge or some gsp / palys when mine grows from one rock to another it looks like thise before the polyps start popping up Link to comment Share on other sites More sharing options...
stylaster Posted January 19, 2012 Share Posted January 19, 2012 yep sponge good filter feeders,help keep the water clean Link to comment Share on other sites More sharing options...
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