Sea slug???

[Feeshrfriendsnotfood]

So I was observing my “pest tank” because I’m weird and couldn’t kill my asterina stars or bobbit (least I think it is) and I saw the curious little fellow below. It’s cute but what is it? Anyone know?

 

[vetteguy53081]

Stomatella snail. One of the BEST algae eaters you can acquire- Keeper