Polycera sp. 2 (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:

        The above featured 8mm animal is one which was found (feeding?) on an arborescent bryozoan colony amid a sandy bottom environment in the waters of Zamami Island, one of a series of islands in the Kerama Islands Group, which are located 30 ~ 40 kilometers west of the Okinawa capitol, Naha. This featured animal was photographed by Atsushi Ono during December of 2016 in twenty eight meters of water. Atsushi reports (pers. comm.) seeing perhaps five individuals of Polycera sp. 2 over a period of several years, all in the Keramas but none were collected. Atsushi's photographs are used here with his kind permission.

        Gosliner, et al, 2015, show a lightly-pigmented animal (Polycera sp. 1, p. 112 which may perhaps be the same as the above featured animal. In addition, I've added a second page with images of two additional animals, also photographed by Atsushi in the Keramas.

        Previously, four described Polycera species as well as a single unknown animal have been featured on these pages, all from the Kerama Islands. These five earlier presented polycerids are:

  • P. abei
  • P. fujitai
  • P. japonica
  • P. risbeci
  • P. sp. 1
  • Literature Cited:

    Updated Link for Okinawa Tides

    Page Date: 01 Feb '17
    Page Modification Date: 01 Feb '17
    Digitally manipulated photo
    Copyright © 2017 Robert F. Bolland