Orange sea hare or limpet?

[Dutch_Mill]

This hitchhiker made its way into my tank. Any ideas?

 

[lapin]

Almost one of these rare ones

Dendrodoris guttata - Wikipedia

en.m.wikipedia.org

 

[ISpeakForTheSeas]

Yeah, some sort of likely Dorid nudibranch - most likely a sponge eater that will starve, unfortunately.

 

[Dutch_Mill]

Yeah, some sort of likely Dorid nudibranch - most likely a sponge eater that will starve, unfortunately.

It must have hitchhiked as a very small nudi and it was eating algae off the glass when I found it.

So theres some good news.