"This tailed bubble snail is characterised by the presence of orange spots on both the dorsal and ventral surfaces and the fine white edge on the parapodia that becomes grey anteriorly. An interesting short paper was just published on C. punctata documenting its diet of acoel flatworms on a brain coral.
Reference: Mangubhai, S. 2007. Chelidonura punctata (Eliot, 1903) preys on acoel flatworms recruiting onto Playtgyra daedala (Ellis and Solander, 1786) in Kenya. Coral Reefs 26: 1057."