Scientists are still learning the mechanics and function of the lightfoot crabs’ vertical jumping. A 2014 study found that crabs of all ages and both sexes can accomplish the feat.

Do crabs swim or walk?

Some crabs swim. Most crabs, like stone crabs and spider crabs, walk or run across the bottom. However, crabs in the family Portunidae have specially modified back legs called swimmerettes. These paddle-shaped legs rotate at 20 to 40 revolutions per minute, allowing the crab to quickly swim through the water.

Where do jumping crabs live?

Distribution. Grapsus grapsus is found along the Pacific coast of Mexico, Central America, and South America (as far south as northern Peru), and on nearby islands, including the Galápagos Islands.