Disease name: Trimethylaminuria (TMAU), also known as "fish odor syndrome" Affected populations: TMAU is a rare metabolic condition that causes a person to smell like rotten fish. The condition is ...

The most common reason why your dog can smell like fish is anal gland issues. If your dog's anal glands are infected, they secrete a fishy, foul-smelling odor. Your dog may also smell like fish if ...