This is one of those fairly common, rarely seen nudibranchs. It can vary significantly in colour, but maintains its warty appearance, notable yellow rhinophores and bright yellow foot. The 5 cm or 2″ individual photographed here was found in approximately 2 metres (6ft) of water in North Kihe, Maui. They are primarily nocturnal, so this was an unusual encounter. For more photos and information, please see Sea Slugs of Hawaii.