Sea locusts, also known as krill, are small, shrimp-like crustaceans found in oceans around the world. They play a crucial role in the marine food web, serving as a primary food source for many species, including whales, seals, and penguins. Sea locusts thrive in cold waters and are often found in large swarms, which can contain millions of individuals. These creatures are vital for the health of marine ecosystems. They feed on phytoplankton, helping to regulate the ocean's carbon cycle. Additionally, sea locusts are harvested for use in aquaculture and as a dietary supplement due to their high nutritional value, particularly in omega-3 fatty acids.