2. The largest scientific name of the genus Octopus known in the scientific community is Octopusapollyon, and the Chinese name is Pacific Giant Octopus, with a general circumference of only 5-6 meters and a weight of 50 kilograms. Their life span is about 4 years, and both females and males will die shortly after laying eggs. The world's largest octopus record holder is a Pacific giant octopus with a circumference of 9. 1 m and a weight of 272 kg.
3. The giant octopus head is big and round, usually reddish brown. They achieve the purpose of changing color through unique pigment cells, and even can be skillfully mixed with corals, plants and rocks with complex patterns. They prey at night, mainly shrimp, clams, lobsters and fish. They even attack and devour sharks and birds. They are distributed in waters of different temperatures in the Pacific Ocean, from Southern California to Alaska, from the western Aleutian Islands to Japan.