It actually looks like some kind of SPS coral to me. I had one on one of my snails. Didn't have enough lights and the thing died, but it definitely had a calcarious skeleton. Touch it. Is it hard or soft and fuzzy?
i have one of those i think...does it look like this???
if so mine will eat live brine...and when i first got mine i looke dmore like yours untill it got healthy
It does look like some type of coral...very kewl. Hopefully the coral(if thats what it is) will out live the snail!
If the coral continues to grow post additional pics...poor guy may not be able to move after a while...
good question.... wait untill it gets some color and then just place some food on it and the tenticals will SLOWLY pull it into its mouth... lucky for you snails are slow enough for it to eat