Distribution: Uncommon in the Solitary Island Marine Park. Recorded from the western and central Pacific, also Bali and Japan. In Australia has been recorded from Heron Island, the Sunshine Coast and northern New South Wales.

Ecological Notes: Frequents rocky and coral reef. Feeds on sponges including Dysidea sp. Depth to at least 10 m.

Additional Notes: Whitish body with wavy parallel black lines, purple edge to the foot. Gills and rhinophores reddish or orange in colour. Grows to at least 25 mm.

References: Gary Cobb, David Mullins, Nudibranchs Encyclopedia, 2nd Edition, 2015. Publishers Thomas Slone, Masalai Press and Tim Hochgrebe, Underwater Australasia. p.152.

Australian Museum, Sea Slug Forum. http://www.seaslugforum.net/find/hypszeph. Accessed 12/08/18.