These were exposed in rubble or reef areas at several different dive sites. 20-40mm.
The one below happened to be next to a Thecacera picta.
Some of the sponges, and sometimes various nudibranchs themselves, were often almost infested with the little reddish to brownish Santia isopods seen on the red sponge in the two photos below..
The reproductive opening is visible as an orange spot on the right side of the animal below the mantle margin, between the rhinophores and gills.
Created 14 June 2015
Updated 28 March 2017
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