Looks like a snail with no shell

[ElTigreBlanco]

Hey everyone first I want to thank everyone for always answering my questions. I just saw this in my tank looks like a snail with no shell. It has the red back

 

[Velcro]

Stomatella. Harmless algae eaters

 

[CoralReefer1019]

could be a nudibranch

 

[Velcro]

could be a nudibranch

No it couldn't lol

 

[cloak]

It looks like a Stomatella snail to me as well.

http://reefkeeping.com/issues/2004-05/rs/index.php