I have had these for awhile and always wondered what they are. Never seen them before. Don't mind the sand on them, I was doing some maintenance on the tank previously. Any Ideas?
Do yours have green slit mouths? Softball sized colony. The larger polyps are nickel sized. A few of mine have the Lighter streaking. I just finished dusting them off an going to take a few cleaner pics.
Wow - those are some really green mouths on yours. Mine do not have that at all. The mouths are darker, similar to the last pic you posted. They don't have quite as pronounced striations either. Nice colonies.