We saw one of these at Melasti in November 2015. Gosliner et al (2018) figure it as Okenia sp. 4. Paz-Sedano et al (2023) recently split off a number of species formerly considered Okenia to different genera, and this one is likely one of those (possibly Bermudella or Ceratodoris).
Created 23 January 2016
Updated 17 December 2023