The Crab
Crabs are fascinating creatures with a hard, protective exoskeleton, two large claws, and four pairs of legs. These scuttling sea critters can be found in a variety of sizes, colors, and shapes, ranging from tiny pea crabs to the giant Japanese Spider crab which can span over 12 feet from claw to claw! They live across the world in different habitats from the ocean to fresh water and even on land. They're known for their sideway walk and many have the ability to swim or burrow into sand or mud!

Crab | |
---|---|
Size | Varies from a few millimeters to 13 feet (4 meters) leg span |
Weight | Varies greatly, up to 44 lbs (20 kg) for the largest species |
Speed | 11 mph (18 km/h) |
Key Strength | Robust claws |
Biggest Weakness | Vulnerable when molting |
Scientific Name | Brachyura |
Family | Decapoda |
Habitat | Ocean, Freshwater, Land |
Geography | Worldwide |
Diet | Omnivores, eat algae, mollusks, bacteria, fungi, and small fish |
Lifespan | 1 year - 100 years |

The Crab
Crabs are fascinating creatures with a hard, protective exoskeleton, two large claws, and four pairs of legs. These scuttling sea critters can be found in a variety of sizes, colors, and shapes, ranging from tiny pea crabs to the giant Japanese Spider crab which can span over 12 feet from claw to claw! They live across the world in different habitats from the ocean to fresh water and even on land. They're known for their sideway walk and many have the ability to swim or burrow into sand or mud!
Fun Fact: Did you know that crabs communicate with each other by drumming or waving their pincers? It's their way of saying "Hello!"
Crab | |
---|---|
Size | Varies from a few millimeters to 13 feet (4 meters) leg span |
Weight | Varies greatly, up to 44 lbs (20 kg) for the largest species |
Speed | 11 mph (18 km/h) |
Key Strength | Robust claws |
Biggest Weakness | Vulnerable when molting |
Scientific Name | Brachyura |
Family | Decapoda |
Habitat | Ocean, Freshwater, Land |
Geography | Worldwide |
Diet | Omnivores, eat algae, mollusks, bacteria, fungi, and small fish |
Lifespan | 1 year - 100 years |
Crab Matchups
We use AI to simulate matchups between the Crab and other animals. Our simulation considers size, strength, and natural predatory behaviors to determine the most likely outcome.
Fun Fact: Hold onto your hat - female crabs can store a male's sperm for a long time and choose when to fertilize their eggs!
Fun Fact: Super sight alert! Most crabs have eyes on stalks, which allows them to peek out from their shells without exposing their body to predators.