Monitor lizard (scientific name: monitor lizard): It is the largest crustacean in existence and the only species of monitor lizard in Arachnoidea. 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, and its life span is 100 years. Two compound eyes grow in front of the body with two thorns in the middle. Living in the Pacific Ocean from Iwate Prefecture to the northeast corner of Taiwan Province Province, the water depth is 500- 1000m, and the average temperature is 10- 15 degrees Celsius. Eat sharks, blind eels, crabs and all kinds of fish.