Will C":24yren12 said:
could be a sand anemone or a polyp let it grow if it gets bigger than a quarter then its an anemone if it stays small and spreads its a polyp.
Pardon my ignorance, but how DO polyps spread? Do smaller ones just sprout alongside?
It does seem to be growing fairly rapid (but it's still fairly small, 3/4's dime-size maybe). It's probably increased in diameter by about 25% over the last 3 days.
Someone on another board mentioned it could possibly be aiptasia. I don't know how many varieties there are, (need to study that) but what I've seen of it (mostly at the LFS I got the sand from) it doesn't look anything like the variety they were having problems with.
The sand however was taken from one of their best coral display tanks... (I was amazed they stirred their sand bed up like that!) - So hopefully something nice slipped into the mix and not something nasty..
Thanks for your thoughts... I guess I'll just have to be patient and see how it goes..