Cuthona sibogae Bergh (1905)
This is one of the prettiest species of Cuthona . Jerry's specimen shown here, from Dos Palmas Resort, Palawan, Philippines, is an example of light colored variation of the species. Often this critter is a deep flamboyant pink (Bill Rudman's Sea Slug Forum), with some specimens approaching purple in color.
Jerry's specimen is crawling on the hydroid prey of this species. The photo was taken on a night dive, when the animal seems to be most active feeding on the polyps of Sertularella quadridens. Webmaster Mike and Jerry note that during the day, little feeding activity was observed.
This species has a very wide distribution - being found though-out the Indo-West Pacific, from Southern Mozambique and Australia, to the Marshall Islands, and even into the Red Sea, at Egypt.
Some folks have confused this species with Flabellina rubrolineata . C. sibogae lacks the longitudinal red lines however. The other major give away is that the rhinophores of Flabellina rubrolineata are perfoliate not smooth as in Cuthona.
He has traveled extensively throughout Asia documenting the marine animals that proliferate this region. He is also an avid nature photographer and is available for field animal behavior documentation assignments.
See Jerry's website at uwshooter.com .
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David W. Behrens
Pacific Coast Nudibranchs
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