This species is listed on the Sea Slug Forum as Costasiella? sp. 2 but the question mark indicates there is some uncertainty about the generic placement. Gosliner et al (2008) call it Stiliger sp. 1. In the Marshalls, we have seen about 10 specimens at Enewetak and one at Kwajalein. All were under rocks on lagoon reefs at depths of 4 to 5 meters. Five measured animals ranged from 4 to 8mm in length.
Created 5 February 2007
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