Hypselodoris kanga from Thailand
December 18, 2002
From: Danny Van Belle
Hi Bill,
To accompany my other message. Are these Hypselodoris zebrina or Hypselodoris kanga or Hypselodoris infucata!!! All filmed at Boonsung wreck, Taplamu, Thailand. Depth between 12m to 20m
Best regards
Danny
dannyvb@hotmail.com
Van Belle, D., 2002 (Dec 18) Hypselodoris kanga from Thailand. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/8688
Thanks Danny,
These are a very useful comparison to your your photos of Hypselodoris zebrina from the same location. I have been indentifying this animal as Hypselodoris kanga althpough the colour of its rhinophores are blue rather than red. Interestingly all the specimens I have seen from the northeastern Indian Ocean and and the contiguous nortwestern Pacific [Hong Kong] have blue rather than red rhinophores. The other interesting feature is the prominent development of bluish purple lines in your animals and almost total loss of blue spots. It is early days, but I would not be surprised if these regional differences were the result of H. kanga mimicking different similarly coloured species in different geographic regions. For example, perhaps in the northeastern Indian Ocean it is mimicking Hypselodoris zebrina. What all colour forms of H. kanga have in common are the yellow spots on the outer face of each gill. It differs from H. zebrina in having gills which are triangular in cross section, each outer edge being lined in bluish purple. One of your photos shows an animal amongst a few patches of a greyish sponge which looks very like a species of Dysidea, which could well be its food sponge.
Best wishes,
Bill Rudman
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