Blowing up like a balloon is far from the weirdest pufferfish trick. The Japanese grass pufferfish beach themselves by the hundreds to mate in a frenzy, often with just one female. (Learn more: https://www.sciencenews.org/article/pufferfish-biology-mating-goofy-spiked-balloon) | Science News Magazine

1.3M views · 6.5K shares | One puffer fish contains enough lethal toxin to kill 30 humans, but sharks are totally immune to it! Get more shark news here → https://www.discovery.com/shark-week/2019-videos/s/shark-news0 | Shark Week | Facebook