Why are crab fisheries at risk for collapse? Just follow your nose — or rather, theirs.
Crabs use their sense of smell like humans use their eyes and intuition. When young crabs are seeking shelter from predators, they use their sense of smell to eke out a good hiding place. A crab's sense of smell is vital for its ability to find food. Once that crab reaches a mature age and is ready to mate, it will use its sense of smell to find attractive partners. Should its sense of smell ever be diminished, the crab's ability to survive will deteriorate accordingly.
