Laying Chromodoris coi from Western Australia

March 27, 2001
From: Drew Taylor

Dear Bill,
Here is a photo of a Chromodoris coi laying eggs that was taken on 22 March 2001, on the Navy Pier, Exmouth, North West Cape, Western Australia, in 11 metres of water.

During this dive I also observed a pair of Hypselodoris bullocki mating beside two sets of egg ribbons, two Chromodoris elisabethina mating and a pair of Risbecia tryoni tailgating.
Regards
Drew Taylor

orcaunderwater@nwc.net.au

Taylor, D., 2001 (Mar 27) Laying Chromodoris coi from Western Australia. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/4039

Dear Drew,
Thanks for these interesting photos. You certainly picked a good time to go looking. I have separated or your photos into separate messages which I will post over the next couple of days.

Your photo of Chromodoris coi is quite interesting as it is probably the first record of this 'western Pacific' species in the Indian Ocean. I have long considered that another closely related species, Chromodoris glenei species replaced it in the Indian Ocean, however a recent message in the Forum shows, what looks like C. glenei, from the Solomon Ids.

The northwestern Australian fauna is obviously of a quite complex origin. While some of it is representative of an endemic Indian Ocean fauna, there seems to have been a mixing across the north of Australia with the Pacific fauna. Until a lot more collecting and study of the fauna of the northwest is undertaken, it will not be possible to sensibly interpret some of the strange colour forms and apparent 'species' we find there.

So your photos are of particular interest.
Best wishes,
Bill Rudman

Rudman, W.B., 2001 (Mar 27). Comment on Laying Chromodoris coi from Western Australia by Drew Taylor. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/4039

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