Ophiarachna incrassata

Ophiarachna incrassata (Lamarck, 1816) (size unrecorded)

Featured Invertebrate Data


Frequency on Okinawa: Collection Data:
Species Account:

        C is considered to be rare on Okinawa as I have collected and photographed only a few specimens, although I've seen additional individuals over a period of more than twenty years of Okinawa diving.

        The following description, habitat and general distribution of Ophiarachna incrassata is taken from WoRMS (World Register of Marine Species):

Description: arm length up to 20 cm, disc diameter to 5 cm. Colour conspicuously green with yellow markings and dark-ringed white spots.

Habitat: among coral bases and rubble.

General distribution: tropical, Indo-west-central Pacific Ocean, littoral waters (Rowe & Gates, 1995); WIO, Red Sea and W Pacific (Richmond, 1998). Also distributed in Java in Ljungman (1866); Ceylon, Bay of Bengal, East Indies, north Australia, Philippine, China, south Japan and South Pacific Is. (Clark & Rowe, 1971); Australia (Rowe & Gates, 1995).

There are several on-line sites with photographs and videos of Ophiarachna incrassata. Several of these sites are:


Blue Zoo Aquatics

Google (numerous photos here)


       Being fed by aquarist

       Numerous individuals in aquarium

       Being fed by aquarist

In addition, Chris Mah has several images and videos of O. incrassata featured on The Echinoblog.


Literature Cited:

        I've added a second page w/ a few additional images of the species.

        In addition, I've added a link to the current and past featured invertebrates via a list and thumbnails.

Page Date: 01 Nov '18
Page Modification Date: 01 Nov '18
Digitally manipulated photo
Copyright © 2018 Robert F. Bolland