Coconut Crabs
07-03-2007, 03:58 AM
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Reports about the size of Birgus latro vary, and most references give a
weight of up to 4 kg (9 lb), a body length of up to 400 mm (16 in), and
a leg span of around 1 m (3 ft),[2] with males generally being larger
than females. Some reports claim weights up to 17 kg and a body length
of 1m [citation needed] It is believed that this is near the theoretical
limit for a terrestrial arthropod. However, when the body is supported
by water, larger sizes are possible (see Japanese spider crab). They can
reach an age of up to 30-60 years (references vary). The body of the
coconut crab is, like all decapods, divided into a front section
(cephalothorax), which has 10 legs, and an abdomen. The front-most pair
of legs has massive claws used to open coconuts, and these claws
(chelae) can lift objects up to 29 kg (64lb) in weight.
The next two pairs, as with other hermit crabs, are
large, powerful walking legs which allow coconut crabs to climb
vertically up trees (often coconut palms) up to 6 m high. The fourth
pair of legs is smaller with tweezer-like chelae at the end, allowing
young crabs to grip the inside of a shell or coconut husk to carry for
protection; adults use this pair for walking and climbing. The last pair
of legs is very small and serves only to clean the breathing organs.
These legs are usually held inside the carapace, in the cavity
containing the breathing organs.
weight of up to 4 kg (9 lb), a body length of up to 400 mm (16 in), and
a leg span of around 1 m (3 ft),[2] with males generally being larger
than females. Some reports claim weights up to 17 kg and a body length
of 1m [citation needed] It is believed that this is near the theoretical
limit for a terrestrial arthropod. However, when the body is supported
by water, larger sizes are possible (see Japanese spider crab). They can
reach an age of up to 30-60 years (references vary). The body of the
coconut crab is, like all decapods, divided into a front section
(cephalothorax), which has 10 legs, and an abdomen. The front-most pair
of legs has massive claws used to open coconuts, and these claws
(chelae) can lift objects up to 29 kg (64lb) in weight.
The next two pairs, as with other hermit crabs, are
large, powerful walking legs which allow coconut crabs to climb
vertically up trees (often coconut palms) up to 6 m high. The fourth
pair of legs is smaller with tweezer-like chelae at the end, allowing
young crabs to grip the inside of a shell or coconut husk to carry for
protection; adults use this pair for walking and climbing. The last pair
of legs is very small and serves only to clean the breathing organs.
These legs are usually held inside the carapace, in the cavity
containing the breathing organs.
07-04-2007, 10:15 AM
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my mom said those are the sweetest crabs though. 
i think i just lost my appetite after looking at that pic again, and especially after searching that japanese spider crab.
i think i just lost my appetite after looking at that pic again, and especially after searching that japanese spider crab.
07-05-2007, 12:50 AM
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Seen lots of these around the Pacific - especially the outer islands of Vanuatu.
To see one of these crack open a coconut is truly amazing.
A lot of the coconut trees have aluminium or sheet metal wrapped around the bottom 2-3 feet of the tree so that these guys can't climb up them to get at the coconuts.
And one of the best meals I have ever had is coconut crab with chilli...
To see one of these crack open a coconut is truly amazing.
A lot of the coconut trees have aluminium or sheet metal wrapped around the bottom 2-3 feet of the tree so that these guys can't climb up them to get at the coconuts.
And one of the best meals I have ever had is coconut crab with chilli...
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