Carrier crabs or urchin crabs are found in the Red Sea and Indian Ocean. They are known to have symbiotic relationships with long-spined urchins which benefit from access to new feeding grounds. The sea urchins are light-weight for the crab and serve as t

Carrier crabs or urchin crabs are found in the Red Sea and Indian Ocean. They are known to have symbiotic relationships with long-spined urchins which benefit from access to new feeding grounds. The sea urchins are light-weight for the crab and serve as t