The Spanish Mastiff, also known as Mastín Español, is a large and imposing breed known for its loyalty, strength, and protective instincts. They are natural guardians and protectors and are known for their strong territorial instincts and will vigilantly defend their home and family against perceived threats. Bred for their working abilities, Spanish Mastiffs have a strong work ethic. They excel in tasks such as guarding livestock and property, and they take their roles as protectors seriously.