Opisthobranch of the Week Data
The above featured animal was collected from an area of mixed sand and coral rubble. It was found crawling on the surface of rubble near the base of a vertical rock wall at the reef edge. Chromodoris sp. 2 is considered to be very rare on Okinawa's main island as I have seen and collected only the above single individual. In a recent message from Richard Willan it was pointed out that this is indeed an undescribed but well-known tropical western Pacific species. Willan (pers. comm., 2004) is familiar with this animal from northern and eastern Australia. Richard points out the above featured animal is a small juvenile with pustules yet to develop on the central notum, but the dark rhinophores with white specks are a reliable identifying character. Given the size difference, everything else matches in terms of both shape and color.
This currently undescribed animal is represented on the Sea Slug Forum as Chromodoris species 10 (Rudman, 2000). Marshall & Willan (1999) also have this animal depicted from Heron Island. (Page 101, Fig. 181).
I've added a second page with an image of the same animal but this second image shows the gills with a bit more detail.