Because it’s fun. And because nobody wants to say, “Hey, look at that octopus with the eight arms crawling across the sand.” Legs just roll off the tongue better.
Plus, have you seen them walk? They do this awesome bipedal thing where they use two arms as legs and the other six float above. It’s hilarious. It looks like a toddler in a Halloween costume.
So, when a regular person asks, you say “eight.” When a marine biologist asks, you say “technically eight arms, but functionally, some are legs.” Then you wink. They love that.
Let’s talk about the real weirdness
Each arm has its own mini-brain. That’s right. An octopus has nine brains—one central one, and one in each arm. So when an arm grabs a crab, it doesn’t even ask the main brain for permission.
That means an octopus could theoretically argue with itself. “Left arm, why did you eat that bad clam?” The left arm would taste the memory of the clam and do a shrug. With its own brain.
Octopus External Anatomy
So when you ask “how many legs,” you’re really asking about a creature that has a committee of brains and eight independent robots attached to its head. Legs? Arms? Let’s just call them “decision makers.”
