In the animal world, there are instances of extremely unpleasant breath—sometimes much stronger than a person's after eating garlic.
There is no exact scientific classification on this issue, but it is known that some species of animals are particularly famous for their foul breath.
The main reasons for such odor are dietary habits and the lack of any "oral hygiene." Food remnants get stuck between teeth and on the tongue, decompose, and intensify the unpleasant aroma.
One of the record holders for bad odor is the humpback whale. These marine giants consume a massive amount of krill, which itself has a strong fishy smell. When exhaling, the whale releases a cloud with a sharp combination of fishy and gas-like aromas.
Other contenders for the title of worst breath include sea lions with their exclusively fish diet, vultures that feed on carrion, and Tasmanian devils, whose bad breath is combined with a sharp musk secretion when threatened.
So if you think that a person can have unpleasant morning breath, some animals have it much stronger and far less tolerable.