Thuridilla splendens? from Great Barrier Reef

Dear Rachel,
With the proviso that I might have it quite wrong, it seems to me that T. splendens has a colour pattern which has two main variables. In Yukari Sato's message[#11398] the photos are identical in colour to Baba's original illustration, which we need to consider the 'standard', just in case there is more than one species involved. Species from Japan all appear to have this colour pattern. However in animals from the central and south Pacific the white areas become bright blue, and the yellow lines and spots can change. In messages from Hugh Dickson [#12026] and Vinka Stenhouse [#1567], both from Vanuatu, the yellow lines near the parapodial edge are replaced by spots. In Nishina Masayoshi animal from Papua New Guinea [#3108], and yours from the Great Barrier Reef, the lower yellow spots have become lines

One problem with this transition is that while Japanese speciemens have longitudinal lines along the rhinophores, the colour pattern is quite different in the blue pigmented animals from the south pacific. However Bruce Potter's photo [#4358] may represent an intermediate, with small yellow spots aranged in lines. So I guess at this stage I will consider this to be T. splendens, but hopefully we will get some more photos to compare from other participants.
Best wishes,
Bill Rudman