Krill are small shrimp-like crustaceans found in all the world's oceans, but mostly in the frigid, pristine waters of the polar seas. Antarctic krill, called Euphausia superba, is the only kind of krill that can be fished because they swim in open water in large swarms that can reach up to 6 km in length and have a density of one million krill per cubic metre.
Krill primarily feed on algae and are the primary food source for many marine mammals and fish. They grow up to 6 cm in length, weigh up to 2 grams, and can live for up to 6 years. Though small in size, the total estimated biomass of krill is 725 million metric tons - almost three times the total weight of all humans on Earth.
Krill has been harvested as a food source for humans and domesticated animals since at least the 19th century. It is a pure, ethical and sustainable marine source of Omega-3 fatty acids, which are essential for cellular health.