Ceratosoma tenue Abraham, 1876

I could find several specimens of this species any time I dove the 12-15m deep ledges off Nanakuli on the western shore of Oahu. Other than that, I recorded one specimen off Makaha and a few more at night at Pupukea, Oahu. Day or night they were mostly exposed on hard reef substrate or on short walls. This contrasts with those we see in the Marshall Islands, where all specimen we have seen have been in lagoon patches of Halimeda algae. Sea Slugs of Hawaii does report some specimens from Halimeda algae patches around Maui. The two photos below illustrate some of the color variation between specimens. Both of these were photographed at Nanakuli.

Links:
Sea Slugs of Hawaii
Sea Slug Forum
Marshall Islands Sea Slugs

Created 20 April 2009

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