Phidiana bourailli (Risbec, 1928)

Distribution: 

Possibly common in the Solitary Islands Marine Park. Indo-west Pacific distribution with records from Tanzania in the Indian Ocean and the Marshall Islands in the central Pacific Ocean. In Australia known from the Sunshine Coast and Heron Island in Queensland.

Ecological Notes: 

Known to feed on hydroids in intertidal and shallow subtidal areas. Found under rocks and dead coral slabs. Depth to at least 10 m.

Additional Notes: 

The rhinophores are distinctive for this genus with a number of evenly spaced ridges, or lamellae. The cerata are usually dark or black and the longitudinal red lines on the body may be unbroken or broken as in this specimen. Similar Facelina newcombi has red mottling and distinctive diamond shape on the dorsal surface mid body. Grows to around 15 mm.

References: 

Gary Cobb, David Mullins, Nudibranchs Encyclopedia, 2nd Edition, 2015. Publishers Thomas Slone, Masalai Press and Tim Hochgrebe, Underwater Australasia. p.220.

Australian Museum, Sea Slug Forum. http://www.seaslugforum.net/find/phidbour. Accessed 08/09/2018.