Check out the world’s largest fish, the whale shark, which can reach lengths of more than 45 feet! These fish were featured in a recent article from Smithsonian Magazine. You would think the diver would be afraid of being eaten by the “shark”, but it turns out these filter-feeders prefer zooplankton, which is how they got their name. Look, no teeth:
How is it the largest animals seem to thrive off the smallest creatures? By eating all day. In fact, a recent study of these animals shows that they spend 7.5 hours per day feeding on the tiny creatures. By their calculations, a 443cm whale shark could eat 1467g of plankton per hour.
I once had a dog that ate all day like that. We called him Hoover.
Motta PJ, Maslanka M, Hueter RE, Davis RL, de la Parra R, Mulvany SL, Habegger ML, Strother JA, Mara KR, Gardiner JM, Tyminski JP, Zeigler LD. Feeding anatomy, filter-feeding rate, and diet of whale sharks Rhincodon typus during surface ram filter feeding off the Yucatan Peninsula, Mexico. Zoology(Jena). 2010 Aug;113(4):199-212.