Thromidia catalai Pope & Rowe, 1977 (from 120ft, photo only, size not recorded)

Featured Okinawan Marine Invertebrate Data


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

Species Account:

        Thromidia catalai is considered to be rare on Okinawa as I have collected and photographed only a single specimen and photographed an additional five individuals between the years 1980~2000. I've seen, but neither collected nor photographed, perhaps 2~3 other individuals. The above featured animal was found crawling in a mixed sand/coral rubble environment in 120 ft. I've also added a second page with a series of additional images of the species.

        There are some excellent photographs of Thromidia catalai on several on-line sites, one of these is Wikimedia Commons Picture of the Year (2013), from Papua New Guinea. In terms of size/weight, T. catalai ranks as one of the largest living species of asteroids and Chris Mah mentions in his Echinoblog site:

These are usually MASSIVE starfish. They can get up to 2 feet across! They tend to occur in deeper water (lower end of SCUBA depth). They have relatively solid surfaces with spiny surfaces. There is relatively little known about their general biology.

        If you have any interest in this group of invertebrates (echinoderms) be sure to visit Chris Mah's Echinoblog site. Lots of information and great photos.


Literature Cited:

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