章鱼用英语说作 "octopus"。这个词来源于希腊语，原意为 "eight-footed"，指这种动物有八条腿。

例句：

The octopus is a highly intelligent and adaptable creature. (章鱼是一种高度智能且能适应环境的生物。)

The octopus's ability to change color helps it blend in with its surroundings. (章鱼改变颜色的能力有助于它与周围环境融为一体。)

I love sushi, especially dishes with octopus. (我喜欢寿司，特别是有章鱼的菜肴。)