Learning It on Instagram: "Krill are often called the “engines of the ocean” because they convert microscopic algae into a form of energy that larger animals can use. Found in enormous numbers, sometimes forming swarms stretching for miles, they sustain whales, seals, penguins, fish, and even seabirds. Despite their size, their importance cannot be overstated—if krill populations decline, entire ecosystems feel the impact. Climate change and overfishing threaten their survival, making them a cri