OKINAWAN
OPISTHOBRANCH OF THE WEEK

Tambja sagamiana (Baba, 1955) size not recorded

Opisthobranch of the Week Data

Taxonomy:

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


Species Account:

        Tambja sagamiana is considered to be uncommon on Okinawa; I've collected only four individuals but I've seen and photographed many others. Populations of this animal would appear to be quite ephemeral; in some years they are frequently seen between approximately 90m and 55m, in other years they are not seen at any depth.

        This spectacular, moderately large-sized polycerid is immediately identified by its bright orange or yellow pustules covering the mantle surface. The featured uncollected animal was photographed in a area of mixed sand and coral rubble at the fore reef area of a live stony coral reef. There were fairly large numbers of aborescent bryozoan colonies present in the surrounding area; other species of Tambja are known to feed on bryozoans, perhaps these do as well.


Copyright © 1999 Robert F. Bolland
Digitally manipulated photo