Thoughts on this tiny flatworm or nudi?

[William Sharkspeare]

After a water change I noticed this tiny little guy on the glass. Very hard to see without the camera zoom. No longer in the tank. There was trace amount of reef jerky dust in the cup which he seemed to appreciate.
Rock is from the Gulf of Mexico, though I have added a few coral frags.
To me it looks like a nudi.

 

[Baldyreef]

cool little nudibranch

 

[exnisstech]

@Gulf Live Rock ?

 

[Mickle]

What do we think of this? https://www.inaturalist.org/photos/8418454
Maybe this is a juvenile, hence the less colors?
Looks to be decently uncommon in the Gulf

 

[Baldyreef]

What do we think of this? https://www.inaturalist.org/photos/8418454
Maybe this is a juvenile, hence the less colors?
Looks to be decently uncommon in the Gulf

yeah definitely looks like one

 

[EnterName]

What do we think of this? https://www.inaturalist.org/photos/8418454
Maybe this is a juvenile, hence the less colors?
Looks to be decently uncommon in the Gulf

Possibly starving. They only eat Chelonaplysilla spp. (purple sponges)

I assume they won't get too dangerous when small and starving, but just a warning: "Chromodorids eat sponges and use toxins produced by the sponge for their own defense. These toxins are released from mantle glands which are clearly visible in some specimens." (Source)

Chromodorididae is the taxonomic family of the genus Felimida.

 

[William Sharkspeare]

What do we think of this? https://www.inaturalist.org/photos/8418454
Maybe this is a juvenile, hence the less colors?
Looks to be decently uncommon in the Gulf

Wow.

Possibly starving. They only eat Chelonaplysilla spp. (purple sponges)

Poor guy

 

[Gulf Live Rock]

That's defiantly a Nudi. I have never ever seen one like that in 25 years of rock collecting, 35 years of diving and never seen one in any books about our area. There is a good chance you picked it up somewhere else. It is very beautiful. Cool find. We do get royal sea goddesses often.

 

[BryanM]

Cool little dude.