The total global harvest amounts to 150,000–200,000 tonnes annually, most of this from the Scotia Sea. [32] Krill can be easily distinguished from other crustaceans such as true shrimp by their externally visible gills. [74], In 2018 it was announced that almost every krill fishing company operating in Antarctica will abandon operations in huge areas around the Antarctic Peninsula from 2020, including "buffer zones" around breeding colonies of penguins. 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For E. superba in the Antarctic sea, inter-moult periods ranging between 9 and 28 days depending on the temperature between −1 and 4 °C (30 and 39 °F) have been observed, and for Meganyctiphanes norvegica in the North Sea the inter-moult periods range also from 9 and 28 days but at temperatures between 2.5 and 15 °C (36.5 and 59.0 °F). [37][38], Many krill are filter feeders:[22] their frontmost appendages, the thoracopods, form very fine combs with which they can filter out their food from the water. [82], Krill (and other planktonic shrimp) are most widely consumed in Southeast Asia, where it is fermented (with the shells intact) and usually ground finely to make shrimp paste. Species with neritic distributions include the four species of the genus Nyctiphanes. Historically, the largest krill fishery nations were Japan and the Soviet Union, or, after the latter's dissolution, Russia and Ukraine. [28] Both are found at latitudes south of 55° S, with E. crystallorophias dominating south of 74° S[29] and in regions of pack ice. They are prey for fish, penguins, seals, and even huge baleen whales or blue whales. [36] The precise function of these organs is as yet unknown; possibilities include mating, social interaction or orientation and as a form of counter-illumination camouflage to compensate their shadow against overhead ambient light. Species of the genus Thysanoessa occur in both Atlantic and Pacific oceans. Yes a betta will eat krill. [10], Krill occur worldwide in all oceans, although many individual species have endemic or neritic (i.e., coastal) distributions. After all, we eat shrimp, we don’t eat krill. [41], Many animals feed on krill, ranging from smaller animals like fish or penguins to larger ones like seals and baleen whales. Of fatty acids are better, Lancraft, T.M., Relsenbichler,,. 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