The Sally Lightfoot Crab gathers on Brazilian shores, waiting for the tide to recede and reveal their feeding grounds on seaweed-covered rocks just 100 meters away. Along this perilous journey, they will leap from rock to rock to avoid the water and predators such as moray eel and octopus.

To make things worse, they also have to face the chain moray, a crab-hunting specialist.

Via BBC Earth.