This Circular Tank Trick Keeps Tuna Alive

Why are the aquariums for Blufin Tuna always designed in a perfect circle? You see, Blufin Tuna need to keep swimming in order to breathe by pushing water through their gills, and even when food is released, they swiftly grab it and keep swimming. But if they slow down for too long, this can cut off their oxygen, so this perfectly circular tank creates a steady current that keeps them moving without ever needing to stop. Why does the mother humpback whale sing a song to her offspring? You see, every pod has its own specific root, and by singing the song repetitively to her offspring during the migration. The mother whale helps her offspring to memorize the root, but if the mom whale tragically dies before passing down the entire song to her offspring, the baby ends up lost in the ocean forever, as it knows no other map. As the Komodo dragons egg hatch, the babies would immediately run away from their mother. You see, big Komodo dragons often hunt anything that moves and even their own children, so the babies are forced to climb the tallest tree where they spend the first few years eating insects. And only once the babies grow big enough to hunt for themselves, They return to the ground and join the adult world.