On Sun, 31 Jul 2011 03:27:34 +0200 (CEST), Dave U. Random
wrote, in part:

http://www.space.com/12475-ufo-ocean-floor.html

Decide for yourself...

I think it's probably an anchor, since some ship's anchors have
non-traditional styles.

It looks too artificial to be a giant trilobite, unfortunately...

John Savard
http://www.quadibloc.com/index.html