What is what dog breed is scooby doo?

Scooby-Doo is a fictional character, so his breed is not definitively established. However, he appears to be a Great Dane in the cartoons and movies that feature him. Great Danes are known for their large size, gentle temperament, and affectionate nature. They are often described as friendly, loyal, and good with children, which is consistent with Scooby-Doo's character traits.