Aldisa sp. 5
Known only from Hawaii
Hawaii. Photos: Scott Johnson.
This is a second Hawaiian Aldisa. Although about the same size and color as Aldisa pikokai, this species is dorsally covered with low rounded bumps. Other differences between it and Aldisa pikokai include the presence of only two middorsal craters instead of three, and the floors of these craters lack darker spots. While Aldisa pikokai has scattered patches of opaque white, this bumpy species tends to have patches that are more yellow, bordered by almost iridescent patches of bluish purple. This Aldisa is considerably less common than Aldisa pikokai but has the same habits; it hides away during the day and is active and exposed at night. This species appears somewhat similar to the Forum's Aldisa sp.1 by Atsushi Ono.
Johnson, S., 2002 (March 17) Aldisa sp. 5 [In] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/factsheet/aldisp5