Fun Facts

By Kaia Costa

1. Octopi have three hearts! Two pump blood to the gills, and one pumps it to the rest of the body.
2. Sea otters hold hands while sleeping so they don’t drift apart in the current.
3. Dolphins give each other names using unique whistles to identify individuals.
4. Starfish (sea stars) can regrow whole arms, and some can regenerate an entire body from just one arm.
5. Blue whales are the largest animals to ever live, even bigger than any dinosaur.
6. Clownfish can change sex—the dominant male becomes female if the group loses its leader.
7. Seahorse dads give birth, carrying the babies in a special pouch.
8. Sharks have been around longer than trees, existing for over 400 million years.
9. Mantis shrimp punch faster than a bullet, creating a tiny underwater shockwave.
10. Jellyfish don’t have brains, hearts, or bones—yet some species have survived for over 500 million years.