Distribution: Rare in the Solitary Islands Marine Park. Distributed throughout the Indo-West Pacific region generally, including South Africa, Reunion Island, north to Myanmar and Thailand, east to at least Fiji, south to southern Queensland. In Australia recorded from around Exmouth in Western Australia, across the tropical north south to the Sunshine Coast and Moreton Island in Queensland.
Ecological Notes: Known to feed on hydroids, particularly Plumularia sp. Coral and rocky reef habitats, depth to at least 20 m.
Additional Notes: Reticulated black and yellow pattern with scattered red-orange spots. The head has two groups of about 5 finger-like papillae, the rhinophoral sheaths have four papillae. There are 3 pairs of flap like cerata dorsally followed by 3 cerata mid-dorsally. There are feather-like gills at the inner base of the anteriormost three pairs of cerata. This species is able to swim rapidly in an eel-like motion by muscular flexion of the body. Grows to 8 cm.
References: Undersea Jewels, A colour guide to nudibranchs, Gary Cobb and Richard C Willan. Australian Biological Resources Study, Canberra, 2006. p. 247
Australian Museum, Sea Slug Forum. http://www.seaslugforum.net/find/bornangu. Accessed 01/01/2022
Atlas of Living Australia at https://bie.ala.org.au/search?q=Bornella+anguilla. Accessed 01/01/2022