We are independent & ad-supported. We may earn a commission for purchases made through our links.
Advertiser Disclosure
Our website is an independent, advertising-supported platform. We provide our content free of charge to our readers, and to keep it that way, we rely on revenue generated through advertisements and affiliate partnerships. This means that when you click on certain links on our site and make a purchase, we may earn a commission. Learn more.
How We Make Money
We sustain our operations through affiliate commissions and advertising. If you click on an affiliate link and make a purchase, we may receive a commission from the merchant at no additional cost to you. We also display advertisements on our website, which help generate revenue to support our work and keep our content free for readers. Our editorial team operates independently of our advertising and affiliate partnerships to ensure that our content remains unbiased and focused on providing you with the best information and recommendations based on thorough research and honest evaluations. To remain transparent, we’ve provided a list of our current affiliate partners here.

Do Crabs Have Teeth?

Crabs aren’t picky eaters. As an omnivore, a crab enjoys both plants and animals, but its main source of sustenance is algae. However, crabs don’t chew their food in their mouths. This chore is handled by the crab’s stomach, which contains exoskeleton materials shaped like teeth that grind together to mash up the food in a section of the stomach called the gastric mill.

A crab uses strong claws to tear apart its food, while its mandibles (or mouth parts) shred the food a bit more, before sending it all along to the digestive tract.

Down the hatch:

  • A typical crab diet includes worms, molluscs (such as snails and slugs), fungi, other crustaceans (including shrimp and barnacles), and often any dead organic matter that happens to float by.
  • Birds have a similar mechanism to process food; they use the gizzard to break up food. They also swallow stones and sand to help the gizzard do its grinding.
  • Examples of other animals that use a gastric mill or gizzard: earthworms, crocodiles, alligators, lobsters, crayfish, barnacles, and krill.
Discussion Comments
All Things Nature, in your inbox

Our latest articles, guides, and more, delivered daily.

All Things Nature, in your inbox

Our latest articles, guides, and more, delivered daily.