Brown sea cucumber (or "deep-water redfish"), <i><a href="https://en.wikipedia.org/wiki/Actinopyga_echinites" class="extiw" title="en:Actinopyga echinites">Actinopyga echinites</a></i>. Specimen found in Kosrae, Federated States of Micronesia.
<a rel="nofollow" class="external text" href="https://picasaweb.google.com/111831854485038517567">François Michonneau</a>
CC BY 3.0
<a rel="nofollow" class="external text" href="https://picasaweb.google.com/111831854485038517567/Holothuroidea?noredirect=1#5443854162433059314">d2008-Kosrae-0084.jpg</a>