These small sacoglossans are uncommon on lagoon reefs at Enewetak and Kwajalein Atolls, where they live under dead coral rocks at depths of 1 to 5 meters. Eight measured specimens ranged from 4 to 10mm in length. They are similar to the animal figured on the Sea Slug Forum as Cyerce sp. 3 and are likely the same species, even though there is some color variation.We have also seen it in Hawaii. As noted for Hawaiian specimens by Cory Pittman on the Forum, this species can swim by flapping its paddles up and down.
The specimen in the two photos below was found as part of a pair on a Kwajalein Atoll seaward reef on 12 April 2010.
While examining the photos of the specimen below observed on a Kwajalein Atoll lagoon reef on 8 February 2008, we came to realize it shared a number of features with what we are calling Cyerce sp. e495. Although the distinct gray pustules of the latter species are not present on these small specimens, those could develop as the animal grows. We think it is likely these two species are the same, but are waiting to find intermediate specimens before making a final decision.
Created 7 February 2007
Updated 14 April 2010