What the heck is this

[Jej34]

Tanks been up and running for about 17 months, I never saw a critter. Today I see this on the back glass.

Any ideas?
Looks like a snail without a shell

 

[Lionfish Lair]

It's a stomatella... which is a snail with a hidden shell They are fantastic.

 

[Jej34]

Awesome thank you, I wonder how he got in there

 

[Lionfish Lair]

They just hitch a ride on in.

 

[Oceansize]

Tanks been up and running for about 17 months, I never saw a critter. Today I see this on the back glass.

Any ideas?
Looks like a snail without a shell

Your tank looks like my tank. Based on our avatars anyway, lol!

 

[Jej34]

Your tank looks like my tank. Based on our avatars anyway, lol!

Wow they do lol!