Nudi from Tulamben Bali

[Ardy]

Hi all, took this pick in 2015 and was amazed that it seemed to be imitating the harlequin shrimp. Anyone know what it is?
Also are the others a male/female and a young one.

 

[Searcaigh]

Looks like two different species there.

Nudibranchs are hermaphrodites i.e. both male and female.

The colourful; one looks like a Trapania scurra - nice find

The white one could be a Trapania sp too.

Pages 142 and 143 of Nudibranchs & Sea Slug Identification Indo-Pacific by Gosliner, Valdes and Behrens.

 

[Ardy]

Thanks a lot Sear, often wondered what it was. The other one is harder as I went through about 20 trapania and threw the towel in for today.
Could it be

Trapania palmula https://www.seaslugforum.net/find/trap​