Good or bad slug?

[Sam25]

I caught this laying babies in my sump. Is it some sort of good slug or something bad like a acropora eating nudibranch?

 

[vetteguy53081]

Caulerpa Slug and eats macroalgae and caulerpa seaweed but I still dont trust these

 

[KrisReef]

That looks like a nudibranch, but I'd yield to Vetteguy's opinion as that critter is not hitting any memory neurons in my head at the moment.

 

[Sam25]

thanks, I removed it so ill play it safe and keep it out