Emergency - ID this nudi before I lose track of him

[clifg]

Can somebody help me ID this guy. Almost looks like a yellow sea lettuce nudi moving around at night.

 

[CanuckReefer]

Looks like Elysia crispata sea slug to me, but not positive....herbivore.

 

[vetteguy53081]

Pull it out until determined. I’m thinking berhelina centrina which May eat coral

 

[tjohnson3]

Notodoris slug I believe… herbivore/algae eater. Typically only out at night time

 

[clifg]

Looks like Elysia crispata sea slug to me, but not positive....herbivore.

It does look a lot like the lettuce sea slug and it lines up because I had two of them. But I haven't seen them in 2 months or so and they were very green last time I saw them. Maybe one lost its chlorophyll or this is a baby?