The undisputed heavyweight champ is the Japanese spider crab (or Macrocheira kaempferi, if you’re feeling fancy). It’s not just the biggest crab—it’s a freaking arthropod with a leg span that can hit 12 feet from claw to claw. Picture a spider. Now picture that spider wearing a crab suit and having a really bad day.
You could wrap its legs around a smart car. I’m not joking. One of these guys could probably give you a hug you’d remember forever. Or a pinch you’d never forget.
Wait, How Big Are We Talking?
Let’s put this in perspective. A human male is about 5’9” on average. A Japanese spider crab’s leg span is longer than a grown man is tall. If you stood next to one, you’d be looking up at its creepy, spindly limbs. Trust me, that’s not a selfie you want to take.
Their body itself is “only” about 15 inches wide. But those legs? They just keep going. And going. It’s like the Energizer bunny of crustaceans, but with more pincers.
