Identification Key to the Phyllidiids of the Indo-Pacific Ocean
According to morphological and anatomical features
Thanks to Alexander Fahrner and Lothar A. Beck

42. Basic colour of dorsum white to pale yellow, always with black rings. No orange colouration present. Foot, gills and oral tentacles white. Number of lamellae on each rhinophoral clavus not exceeding 24. - 43

- Basic colour of dorsum orange, mostly with 4-10 black rings, bordered in white, each with a central orange or white tubercles. Considerable variation in pattern of individuals; instead of forming rings, black areas can also expand and meander across the dorsum. Foot, gills and oral tentacles grey. Number of lamellae on each rhinophoral clavus 27-30 (specimens larger than 40 mm). Common species throughout the tropical Indo-Pacific. - Phyllidia ocellata Cuvier, 1804