Nearly black at first glance, this nudibranch comes alive with flashes of deep blue scattered across its back and along the mantle edge. Its dark, slightly wrinkled body has a soft, velvety quality, while blue-green and violet tones gather around the rhinophores and feathery gills. The overall effect is moody rather than gloomy, with just enough electric color to keep this shadowy little animal from disappearing completely into the reef.
Size: Up to around 70–75 mm
Range: Indo-Pacific; from East Africa and the Red Sea through the Philippines, Indonesia and Japan to Australia, New Caledonia, Fiji and Hawaii
Habitat / Depth: Coral and rocky reefs, including sand and rubble areas, from shallow water to around 35 m
Diet: Feeds on bryozoans, particularly arborescent colonies
