Any of numerous carnivorous marine mollusks of the genus Octopus or related genera, found worldwide. The octopus has a rounded soft body, eight tentacles with each bearing two rows of suckers, a large distinct head, and a strong beaklike mouth.

• 章鱼像章鱼这一类或相关种类的食肉海洋软体动物，在世界各地都有发现。章鱼有圆形的柔软身体，八个触脚，每个触脚带有两排吸盘，巨大而分明的头，强大的鸟形嘴