Story Time: The weekly weird
Coconut crab claw strength Vs lion’s bite!
Scientists measured the incredible strength of the coconut crab, the world’s largest terrestrial arthropod, for a study published in the journal PLOS One. The findings showed that the pinching force of the coconut crab was comparable to the bite force of some of nature’s most formidable predators, including lions.
Coconut crabs, native to islands throughout the Pacific and Indian oceans, can climb trees, shred coconuts with ease and have even been rumoured to eat kittens.
To gather data, researchers used a bite-force measuring device to determine the pinching force of 29 wild coconut crabs collected from the Japanese island of Okinawa. The process was simple: each crab pinched down on the device with its left claw and the scientists recorded the amount of force exerted.
The crabs can generate pinching force about 90 times their body weight. The crab’s pinching force was almost equal to the bite force of an adult lion, or four or five times the force of a human bite.
According to the study, coconut crabs are believed to have developed their strong pincers as a powerful weapon, as well as a way of tearing things like coconuts for food. They share an ancestor with hermit crabs, but the species stopped using shells for protection and instead developed a hard outer layer to protect their bodies.