Snail?

[miner_skyline]

I got this.....for 82 cents here in Japan and it looks like a giant snail but I am not sure, any ideas.there is a regular snail about 2 inches behind to the left

 

[Fluff]

Looks like a mexican turbo (Turbo fluctuosa)

 

[miner_skyline]

went to the supermarket today here in Japan. passes by the seafood section and to my surprise they had the same kind of snails that i have in my aquarium. Now I know I have a (Turbo cornutus) or Sazae the Japanese name, maybe I'll start shopping at supermakets for my inverts instead of LFS HAHAHA.