Add Yahoo as a preferred source to see more of our stories on Google. Pufferfish can inflate up to three times their normal size by rapidly swallowing water to appear larger and deter predators.

Pufferfish are among the most unique fish in the sea—and sometimes in freshwater too! As their name suggests, pufferfish can inflate like a balloon, transforming from a seemingly ordinary fish into a ...

Pufferfish can inflate up to three times their normal size by rapidly swallowing water to appear larger and deter predators. Although dramatic, inflation is often a last-resort defense because it ...