Tropical western and central Pacific and eastern Indian Ocean: Christmas Island, Indonesia, the Philippines, Japan, Australia, New Caledonia, Tonga and the Marshall Islands
Description
A large, showy Goniobranchus named after Kunié, the Kanak name for the Île des Pins in New Caledonia, where it was first collected. It has a wide mantle skirt whose whole edge it raises and lowers together in a characteristic waving motion. It belongs to Rudman's 'Risbecia tryoni colour group' of purple-spotted chromodorids.
Cream to ochre or brownish mantle, often with a reticulate pattern, scattered with large purple spots each ringed in white. Mantle edge has a broad violet border made of three slightly different-coloured bands. Rhinophores and gills violet.
Similar species
Hypselodoris tryoni has only a narrow purple line at the edge, a high body and little mantle overlap. Goniobranchus leopardus has leopard-like clusters of marks forming hollow squares and a narrow border. G. geminus has four colour bands on the edge (white, greyish-purple, white, yellow).
≈Habitat & diet
Habitat
Coral reefs; recorded from shallow water to at least 20 m.