Land hermit crab
A unga crab.
Captured and sold at village fair. Local name for coconut crab is "uga". Live to a very old age if not caught. http://www.seafriends.org.nz/niue/miracles.htm#coconut_crab
Juvenile coconut crab and the shell it had just come out of in Guam.
I believe this was a young coconut crab, or ayuyu in Chamorro (found in Guam at Tagachang beach).
Captives tethered to a table on market day.
The coconut crab, Birgus latro, is a species of terrestrial hermit crab, also known as the robber crab or palm thief. It is the largest land-living arthropod in the world, and is probably at the upper size limit for terrestrial animals with exoskeletons in recent Earth atmosphere, with a weight of up to 4.1 kg (9.0 lb). It can grow to up to 1 m (3 ft 3 in) in length from leg to leg. It is found on islands across the...