Ghost
Crabs - my Note
info1
info2
info3 (feeding on a dead fish)
painted ghost crab
Ghost Crab Eyes -
It has large black eyes that are supported on stalks. Its eyes help it
see in any direction. There are horns attached to the end of the eyes of male
crabs. It is by these horns that the gender of a crab is recognized. The eyes of
these creatures are sensitive to changes in light.
http://www.animalspot.net/ghost-crab-sand-crab.html
Hermit crab
http://www.wisegeek.com/what-are-hermit-crabs.htm
side note - Google: helmet shell species will give seashells or sea snail animals of Family Cassidae. info1 wiki