Algea? ID?

[mark]

Lobophora.

Remove the rock now, seriously.

I've been battling the stuff for years and it's not pretty. In all my searches can't find any reference to a fish that will touch it only urchins. Tried a pin cushion and long spine both would eat around it.

To clear it I'm using a dental pick and tweesers but even that's a bit of a bust.

Sure people will post nuitrent control, not saying my tanks ideal but I feed to a minumun, use RO/DI etc. to no effect.

Few posts on Reef Central about the stuff.