Red-Margined Glossodoris Nudibranch

"This elongate-oval dorid has a white body covered with minute orange-brown flecks giving it the overall appearance of a brown animal. The margin is white, edged with a fine orange or tan line in most individuals. The mantle margin becomes more elaborately folded with increasing age. The rhinophores and gills are light brown, lined with white."
Source: http://seaslugsofhawaii.com/species/Glossodoris-rufomarginata-a.html