Sally lightfoot crab
Grapsus grapsus is one of the most common crabs along the western coast of the Americas. It is known as the red rock crab, or, along with other crabs such as Percnon gibbesi, as the Sally Lightfoot crab. Wikipedia
Scientific name: Grapsus grapsus
Class: Malacostraca
Domain: Eukaryota
Family: Grapsidae
Kingdom: Animalia
Order: Decapoda
Phylum: Arthropoda