Distribution: Common in the Solitary Islands Marine Park. Circumtropical distribution throughout the Indo-West Pacific and Atlantic oceans. Recorded from northern Queensland to southern New South Wales on the east coast of Australia.

Ecological Notes: Frequents rocky and coral areas, sometimes silt or mud, intertidal to a depth of 30 m.

Additional Notes: Sometimes found in large numbers, this species feeds on blue-green algae which forms on rocks or the surface of muddy shores. Dark longitudinal lines and blue eyespots help distinguish this species, which in common with most sea hares, exudes a reddish purple ink if disturbed. Grows to at least 65 mm in length.

References: Gary Cobb, David Mullins, Nudibranchs Encyclopedia, 2nd Edition, 2015. Publishers Thomas Slone, Masalai Press and Tim Hochgrebe, Underwater Australasia. p.55.

Australian Museum, Sea Slug Forum. http://www.seaslugforum.net/find/stylstri. Accessed 27/09/2018.