The difference between krill and shrimp skin: shrimp skin is made from hairy shrimp, while krill is a marine invertebrate similar to shrimp. Krill is a marine species with wide distribution and large quantity. It is an important bait for many commercial fish and baleen whales, and is also the target of fishery. The body is transparent, and the cephalothorax is healed with the entire cephalothorax, but does not extend toward the ventral surface, so no gill cavity is formed; the gills are exposed and immersed directly in the bathing water. Krill has obvious swarming characteristics and is the main zooplankton that forms the sound scattering layer. It has received great attention in the study of ocean hydroacoustic physics. Antarctic krill is rich in resources and is known as "the world's future food bank" with an annual output of more than 500,000 tons. China's largest output is Pacific krill from the Yellow Sea.

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