Oxynoe antillarum Morch, 1863  

"Body green, to 3 cm, with glossy, inflated shell covering middle body; shell partially covered by adherent parapodia; greyish spots on elongate, greenish tail, with scattered papillae on parapodia, tail, and body. This species is easily confused with Oxynoe azuropunctata K.R. Jensen, but Bermuda specimens have planktotrophic larvae, so are Oxynoe antillarum. Common [in Bermuda] on Caulerpa racemosa to depths of 3 m, in ares of good circulation, usually occuring with Volvatella bermudae (Clark, 1982)" (Clark, 1984, Nautilus 98(2), p. 87-88).

The animal is green, often with translucent white spots all over. There is a characteristic pattern of mottled white pigmentation. The rhinophores are mottled white and thee is a band of this color extending along each side of the head from the base of each rhinophores. They have a fragile bubble-shaped transparent shell which is hidden between the parapodia flaps (Valdés et al., Caribbean Sea Slugs, 2006).