The dog breed that is characterized by black spots on white fur is the Dalmatian. Dalmatians are a medium to large-sized breed that is known for their distinctive spotted coat. They have a white coat with black or liver-colored spots that are either round or oval in shape. Dalmatians are active and athletic dogs that were originally bred as carriage dogs, running alongside horse-drawn carriages and protecting them from other dogs and animals. They are also popular as family pets and have a reputation for being loyal and affectionate.