Janolus sp. 5 (8mm)
Photo by Atsushi Ono

Opisthobranch of the Week Data


Frequency on Okinawa: Collection Data:
[brackets indicate range for all Okinawa-collected specimens of the species]

Species Account:

        Janolus sp. 5 was photographed by Atsushi Ono during April of 2005 in the waters off Gahi Island, one of a series of islands in the Kerama Islands Group, which are located 30 ~ 40 kilometers west of the Okinawa capitol, Naha. Atsushi discovered the animal amid rock and dead corals. The above image is used with Atsushi's kind permission and he reports (pers. comm.) seeing only the above single individual, and of course considers the species to be very rare in the Keramas. Incidentally, Atsushi believes this animal to perhaps be the same as his Janolus sp. 3 featured in his most recent book (Ono, 2004, p. 237, #O-510).

        I've not found Janolus sp. 5 in the waters of Okinawa's main island as of the current date. I have however featured a series of described and unknown Janolus species previously on these pages. These Janolus species are:

  • J. mirabilis
  • J. savinkini
  • J. toyamensis
  • J. sp. 1
  • J. sp. 2
  • J. sp. 4
  • J. sp. 5 (the above featured animal)
  • J. sp. 6
  • J. sp. 7
  • J. sp. 8
  • Literature Cited:

    Page Date: 06 Feb '06
    Page Modification Date: 01 Sep '14
    Digitally manipulated photo
    Copyright © 2014 Robert F. Bolland