Castor and Pollux are twin brothers in Greek mythology, known as the Dioscuri. They are often associated with horsemanship and are considered protectors of sailors. Castor is a skilled horseman, while Pollux is a boxer and known for his strength. The twins are the sons of Leda and Zeus, although their parentage varies in different myths. They are celebrated for their close bond and adventures together, often depicted in art and literature. Their story symbolizes loyalty and brotherhood, and they are also associated with the constellation Gemini.