The largest type of dolphin is the orca, also known as the killer whale (Orcinus orca). Orcas can reach lengths of up to 32 feet (about 10 meters) and weigh as much as 11 tons. They are recognized for their distinctive black and white coloring and are highly social animals, often traveling in pods. Orcas are apex predators, displaying complex hunting techniques and vocal communication. Their intelligence and adaptability in diverse marine environments make them fascinating subjects of study for marine biologists.