1. Walking Sideways: Most crabs walk and run sideways instead of forwards! Their leg joints are built in a special way that makes sideways scurrying much faster and easier.

2. Crustacean Cousins: Crabs belong to a family of animals called crustaceans, which means they are close underwater cousins to lobsters, shrimp, and woodlice (roly-polies)!

3. Wearing Armor: Crabs are protected by a hard outer shell called an exoskeleton. Because the shell doesn't grow with them, they have to shed it completely (called molting) and grow a brand-new, bigger suit of armor.

4. Built-In Boxing Gloves: Male fiddler crabs have one giant claw that is much bigger than the other. They wave it around to look tough, show off to other crabs, and defend their territory!

5. Tasting with Their Feet: Believe it or not, crabs don't just use their feet for walking—they actually have tiny sensors on their feet and legs that help them taste their food as they walk over it.

6. Superhero Strength: A coconut crab is the largest land-living crab in the world, and it has powerful claws strong enough to crack open tough coconuts with ease!

7. A Group is a "Cast": When a whole bunch of crabs get together in a group, it is called a cast—just like a group of actors in a play!