The term 'Black-and-White Swimmer' refers to the ORCA, a species of whale found in all oceans around the world. Orcas are easily recognizable due to their distinctive black and white coloration. They are highly intelligent and social animals, living in pods and communicating with each other through a variety of vocalizations. Orcas are apex predators, feeding on fish, seals, and even larger whales. They are also known for their acrobatic displays, often breaching the surface of the water and performing flips and other stunts.