Rare in the Solitary Islands Marine Park. Previously recorded no further south than Hastings Point in northern New South Wales. Distributed widely throughout the tropical West Pacific region.
Has been recorded feeding on dark purple sponge Chelonaplysilla violacea. Depth to at least 20 m.
Similar in appearance to Hypselodoris tryoni, best distinguished by the form of the purple spots, which in this species usually form a squarish hollow ring. Other differences include the colour of the rhinophores which in G. leopardus are light with a darker vertical line. Grows to at least 50 mm.
Gary Cobb, David Mullins, Nudibranchs Encyclopedia, 2nd Edition, 2015. Publishers Thomas Slone, Masalai Press and Tim Hochgrebe, Underwater Australasia. pp.137-8.
Australian Museum, Sea Slug Forum. http://www.seaslugforum.net/find/chroleop. Accessed 07/08/18.