A pitiful few members of the blue crab family have paddle-shaped legs that allow them to row through the water.
Some crabs such as the Leaf Porter Crab hitch a ride on floating objects like leaves. This peculiar crab from Singapore uses leaves both as a flotation device when traveling and as defense against predators.
When threatened, it will flip the leaf over and hide, tricking potential predators.
The huge majority of crabs, however, cannot swim.
They sink firmly to the bottom and walk across the ocean floor.
