How big can crabs grow?

 

 

                       The biggest crab is the giant spider crab found in the Pacific Ocean, near Japan. The crab lives at a depth of up to 300 m. when it claws are outstretched, they can span as much as 3.6 m. the giant spider crab’s body is actually quite small and is only 37 cm across, but the whole animal may weigh as much as 18 kg.

Picture credit: google