2 Uknown Critters!

[Azilla]

Well last night i was lookin in my tank as i do every night to see what is new. Its amazing what u find everynight. Well first thing i noticed are about 6 snails. The snails are Brown and Black. Shell is more flat they seem to enjoy the liverock more then glass but they do go on the glass.
SNAILS


Next i was lookin at my turbo snail and saw this creature on its back. It moves real fast and has a metalic Shine to it when light hits its back. Also notice as i examined it has small tenticles off of it dunno if it stings or not.
it would fan out kind like a manta ray when movin in the cup i had it in. Its snout looks like a snails.


Anyone know what these are?? They are all still in my tanks and by the way they are acting they seem to be harmless so far.