The biggest crab in the world is the giant crab. It is the largest crustacean in existence and the only species of the genus Macrobrachium in the family Spider Crab. The body is dark orange, with ten long limbs and white spots on it. The first two limbs develop into chelates. The largest sample leg is 4.2 meters long, 38 centimeters long and 20 kilograms long after deployment, and its life span reaches 100 years. Two compound eyes grow in front of the body with two spines between them.

Morphological characteristics of giant crab.

The weight of giant crab 16 to 20kg, with an average length of 3m, and the opening span of double claws can reach 4.2m.. There are extremely sensitive earthquake-sensitive organs in the body, which can distinguish moving objects on the sea surface, and this crab is extremely flexible and agile in water. The giant crab is spindle-shaped with sharp ends. 10 crab claws are long and sharp, especially those claws are like Gang Qian, which are very powerful. All claws are spread out and can cover the range of 3 meters in diameter.

Living in the Pacific Ocean from Iwate Prefecture to the northeast corner of Taiwan Province, with a depth of 500-1000 meters and an average temperature of 10-15 degrees Celsius. Eat sharks, blind eels, crabs and all kinds of fish.