八爪鱼的英文是 octopus。来源是拉丁文 octo，意思是八，加上英文词根 -pus，意思是足，所以八爪鱼就是指有八条腿的鱼。

下面是一些英文例句：

The octopus is a fascinating sea creature with eight flexible arms.

The octopus can change its color and texture to blend in with its surroundings.

The octopus is known for its intelligence and problem-solving abilities.

I ordered the octopus tentacle salad at the sushi restaurant.

The octopus's powerful suction cups help it to move and catch prey.