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A krill swarm Most krill are swarming animals; the sizes and densities of such swarms vary by species and region. For Euphausia superba , swarms reach 10,000 to 60,000 individuals per cubic metre.
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 animals per cubic metre. [ 3 ]
They swarm and mostly feed on plankton. This group is composed of only 90 species, some of which are the most abundant species on the planet; in fact, it is estimated that the biomass of the Antarctic krill Euphausia superba' is 500 million tons. [4]
One swarm was observed to cover an area of 450 square kilometres (175 square miles) of ocean, to a depth of 200 meters (650 feet) and was estimated to contain over 2 million tons of krill. [117] Recent research suggests that krill do not simply drift passively in these currents but actually modify them. [ 117 ]
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Euphausia crystallorophias is a species of krill, sometimes called ice krill, [1] crystal krill, [2] or Antarctic coastal krill. [2] It lives in the coastal waters around Antarctica , further south than any other species of krill. [ 2 ]
Euphausia pacifica, the North Pacific krill, is a euphausid that lives in the northern Pacific Ocean. [2] In Japan, E. pacifica is called isada krill or tsunonashi okiami (ツノナシオキアミ). It is found from Suruga Bay northwards, including all of the Sea of Japan and the south-western part of the Sea of Okhotsk.
The members of the Euphausiacea are commonly called krill and are all marine shrimp-like species whose pleopods (abdominal appendages) function as swimmerets, they swarm and mostly feed on plankton, this group is composed of only 90 species, but some of these are one of the most abundant species on the planet, in fact, it is estimated that the ...