Re: Chromodoris willani from Yap, Micronesia

September 19, 2008
From: Mitsue Yasui

Concerning message #21645:

Hi Bill,

Thank you very much for the answer. I was excited to hear that this could be Chromodoris willani. I learnt a lot about the differences between C. dianae and C. willani from the earlier messages in this site.

By the way, am attaching two more photos taken during the same dive. They may have wider backgrounds than those I sent before. The lower one is a typical C. willani which was found about 30 m apart from the colour form. I couldn't find any special C. willani like this after that day.

Locality: Near Laura Marine wreck in Colonia harbor, Yap Island, Micronesia, 20 m, Yap State, FSM, North-west Pacific, 13 June 2008, Intertidal. Length: 5 cm. Photographer: Mitsue Yasui.

Best Regards,
Mitsue Yasui

naturesway@mail.fm

Yasui, M, 2008 (Sep 19) Re: Chromodoris willani from Yap, Micronesia. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/21895

Dear Su,

Thanks for the message. In fact the animal in your lower photo is not a 'typical' C. willani but Chromodoris lochi. It is very similar in colour to C. willani, but the most obvious difference is that the gills lack the white spots so typical of C. willani. It is not unusual to find the two species together, or nearby, as they seem to feed on the same species of sponges. In your upper photos [of C. willani] both the dark brownish sponge which the animal is sitting on, and the grey sponge just above, are both potential food sponges for this species.

Best wishes,
Bill Rudman

Rudman, W.B., 2008 (Sep 19). Comment on Re: Chromodoris willani from Yap, Micronesia by Mitsue Yasui. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/21895

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