Selection: Durvilledoris pusilla

Durvilledoris pusilla (Bergh, 1874) [Chromodoris]

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There are many similar coloured chromodorids which Bill Rudman calls the "Noumea purpurea colour group". The mantle of Durvilledoris pusilla is pale pink with a broad cream-white or yellowish band at the edge. There is an elongate white streak in the midline between the rhinophores and another in front of the gills.
Pretty similar are:
Noumea norba, which has a white band around the gill pocket
Durvilledoris similaris which has an translucent pinkish purple mantle and a median white line which forms a ring around the gill pocket. The upper half of the rhinophores and gills is translucent red/orange, the lower half is pale, and
Noumea alboannulata which has an opaque white band in the midline which splits just behind the rhinophores to form an elongate oval which encircles the gill pocket.
More informations on Durvilledoris pusilla are at Bill Rudman's Sea-Slug Forum!