Krill travel in swarms so dense they can actually be seen from space. This program simulates simple agents (boids) that are allowed to move according to a set of basic rules. Read more on krill harvesting and sustainability here. For Euphausia superba, swarms reach 10,000 to 60,000 individuals per cubic meter.
The report, published in the journal Deep Sea Research I, described how the research team discovered there are two types of swarm: small swarms composed of adult krill, and large swarms …

Most krill are swarming animals; the sizes and densities of such swarms vary by species and region. One of the main characteristics of this specie is its ability to form large swarms , . They spend their days avoiding predators in the cold depths of the Antarctic Ocean, some 320 feet (100 meters) below the surface. Also, krill can swarm in densities of between 10,000 and 30,000 individuals per cubic metre.
Swarming is a defensive mechanism, confusing smaller predators that … For lack of a better comparison, that’s the same as the entire population of Australia fitting into the space of three maths classrooms. Not only do they swarm together (do you think they're trying to look big to scare of their predators? They’re also prey for many species, including whales, seals and penguins, and are key to the Southern Ocean ecosystem. ),but they can swim backwards to escape danger.

The krill herds are aggregations with no parallel orientation existing on time scales of hours to days and space scales of 10 s to 100 s of meters. Swarm behaviour was first simulated on a computer in 1986 with the simulation program boids. The model was originally designed to mimic the flocking behaviour of birds, but it can be applied also to schooling fish and other swarming entities.

; These tiny guys have crazy defensive techniques. Although each individual grows to no more than 2 inches long, these oceanic crustaceans form massive swarms that can be seen from space. Krill is therefore among the species with the largest biomass on earth, and krill swarms are even visible from space! Antarctic krill (Euphausia superba) are gaining attention as the animal species with the largest biomass on the planet. 10 000 eggs. Antarctic krill (Euphausia superba) is a species of krill found in the Antarctic waters of the Southern Ocean.It is a small, swimming crustacean that lives in large schools, called swarms, sometimes reaching densities of 10,000–30,000 individual animals per cubic metre. A large swarm of randomly swirling krill makes it much harder for fish to pick out any single target. Ironically, krill swarms are so huge that it has become viable for a much larger kind of animal- the baleen whales-to evolve the specialised apparatus for straining out several tons of krill in a single gulp. With such a tremendous biomass, krill is a sought after meal for whales, penguins, birds and fish.

And it’s estimated that the total weight of Antarctic krill is more than the weight of all humans on Earth.