Janolus sp. 4? from Singapore.
December 15, 2008
From: Toh Chay Hoon
Concerning message #7100:
Dear Dr Bill,
This nudibranch was sighted on a sandy substrates while diving at Pulau Hantu, one of Singapore's southern islands. It looks similar to Janolus sp. 4.
It was moving pretty fast and I would say it's like how a big fat juicy caterpillar moves.
Locality: Pulau Hantu, 15 m , Singapore, South China Sea, 23 March 2008, Sandy Substrates. Length: 20 mm. Photographer: Toh Chay Hoon.
Toh Chay Hoon
Toh C.H., 2008 (Dec 15) Janolus sp. 4? from Singapore.. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/22081
Dear Chay Hoon,
It is often difficult to determine if these aeolid-looking nudibranchs are aeolids or something else - perhaps even sacoglossans. Fortunately, as we can see in a close-up of one of your photos, this animal has the wrinkled ridge [caruncle] between the rhinophores which shows it is indeed a species of Janolus. Bernard Picton [message #21950] wondered whether there were two species in the group I am calling Janolus sp 4, so there si the possibility that there is more than one species involved. Your animal certainly falls into the range of colour pattern I am considering to be Janolus sp 4.
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