Furry growthon live rock

[pearlscale]

As soon as I learn how to post pics I'll show it but for now... I have a white "furry" growth on a piece of live rock that bothers me. Water chemestry is fine, ammonia, nitrates, nitrites, etc. The rock has a beautiful coating of coarline alge with many tiny "feather duster like" creatures I dont want to loose. The growth seems confined to one corner and has not seemed to spread at all. Actually it looks cool and usually if all else stays ok I dont remove anything that may be found on a reef. Not much info I know but any thoughts?

 

[revhtree Verified Admin]

Could be sponge and honestly it doesn't sound like anything to worry about.