Can you tell the age of a crab by the number of legs it has?

No, the number of legs a crab has does not indicate its age. In fact, crabs can regenerate lost limbs, so the number of legs is not a reliable indicator of age.

Instead, scientists use other methods to determine a crab's age, such as examining the rings on its shell or by looking at its size. Crabs, like many other animals, grow and molt throughout their lives. As they grow, they shed their exoskeleton and form a new one, which creates rings on the shell. By counting these rings, scientists can estimate a crab's age. However, this method is not foolproof, as the rings can be difficult to see and may not always correspond with the crab's actual age.