Blue with a narrow orange rim and black lines that stop short of the tail.
A chromodorid to about 5 cm, the mantle a clear mid-blue with a broad black band inside a narrow orange-yellow border, and a set of black longitudinal lines on the back that characteristically do not reach the rear margin. The gill and rhinophores are orange. Against Chromodoris annae, the differences are the orange border, which here is narrow and even rather than broad, and the line pattern, which is cleaner and more regular; against C. lochi, the presence of any orange at all.
The species most often mislabelled in the group, in both directions, because the four common blue chromodorids differ by margin width and gill colour rather than by anything a diver notices at arm’s length. Feeds on sponges. Recorded from about 3 to 30 m on rubble and rock across the western Pacific. Worth photographing square-on and from directly above: the margin and the line endings are the identification, and an oblique frame loses both.
Ratings are per location: 1 means found on most dives that look for it, 5 means a handful of records. Where enough dives have been logged the figure is calculated from them; otherwise it is an editorial estimate, and says so. We publish habitat and destination, not the dive site.
