Hi. Seems I have a hitchhiker, pic below. It looks like some kind of snail, about 1/2 inch long with a black and white checkerboard pattern on his shell. Is it safe? He's staying on the zoo, and doesn't seem to bother it too much. Any help will be greatly appreciated.
I know: When in doubt pull it out. But it looks cool so I'd like to keep it.

I know: When in doubt pull it out. But it looks cool so I'd like to keep it.
