Chromodoris annae can reach a maximum size of 5 cm length. The body is elongate with a foot which is distinct from the upper body by a skirt like mantle hiding partially the foot. The branched gills and the rhinophores are orange to yellow and can be withdraw in specific pockets under the skin in case of danger. The main background color is bluish, the intensity of the latter varying from blue-grey to intense blue, slightly speckled by black tiny spots. The blue dorsal side and the foot are bordered with a black line which can be discontinuous depending on the specimen. A black dash cross the pair of rhinophore and represents a distinctive sign within the other similar species like Chromodoris elisabethina and Chromodoris westraliensis. The mantle edge and the foot are bordered with white and orange to yellow lines in which the width and the color intensity can vary greatly from a specimen to another.
Chromodoris annae in Bunaken, Sulawesi
- Debelius, Helmut, 2001, Nudibranchs and Sea Snails: Indo-Pacific Field Guide, IKAN - Unterwasserarchiv, Frankfurt, Germany.
- P.L.Beesley,G.J.B. Ross,A.Wells,Mollusca-The southern synthesis, vol.5, CSIRO, 1998,ISBN 0-643-05756-0
- David Behrens, Nudibranch behaviour, Newworld Publication INC., 2005, ISBN 978-1878348418
- Gary Cobb & Richard Willan, Undersea jewels- a colour guide to nudibranchs, Australian Biological Resources Study, 2006, ISBN 0642568472