a beginners first of many questions

[woodeye]

hello, and im excited to be here. i recently set up a 29gal bio cube with the help from a friend marine pro. i put some live rock in there and one of many critters that hitchhiked on the rock was this slug lookig creature that we cant identify. ive posted the best pics i could get of it. it moves like a snail while sucking on the rock as it goes along. its very pale blueish and seem to be a bit hairy. the "shell" reminds me of a fingernail but appears to be soft. any help with this id would be great. thank you.

 

[Reefing Madness]

Looks like a Stomatella Snail. Good hitch hiker.