Sea slug ID

[jstabile316]

Can anyone identify this sea slug, pulled out a few rocks to scrub and found this guy, I haven’t added anything to the tank in over a year and everything is doing well so I’m guessing it’s reef safe. Was thinking maybe a lettuce sea slug but maybe someone can confirm. Should I put it back?

 

[Crabs McJones]

Decent sized polyclad flatworm, definitely remove it

 

[jstabile316]

Actually more I’m looking online it looks to be a giant flatworm.

 

[ISpeakForTheSeas]

Decent sized polyclad flatworm, definitely remove it

Actually more I’m looking online it looks to be a giant flatworm.

Yeah, it's a type of polyclad flatworm:

Welcome to Reef2Reef!

Those are two Leopard Flatworms - Pericelis tectivorum; the Reticulated/Giant Predatory/Leopard Flatworm specifically. They are known to eat snails.