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The metazoan meiofauna in the Arctic Chukchi Sea were collected from the 7 shallow waters stations (depths ranges 46-52 m) and 5 deep sea waters stations (depths ranges 393-2300 m) in the Chinese fourth scientific expeditions to the Arctic in 2010.The results showed that (1) in the shallow water stations: the total number of taxa was ten, and the dominant groups of meiofauna were free living marine nematodes with an average quantity of 96.6±4.6% of the total, and Harpactoid copepods ranking the second with an average quantity of 2.5±3.9%.Bivalvia, Polycheata and Naupii also regularly occurred.The abundance of meiofauna ranged between 609 ind./10 cm2 and 6262 ind./10 cm2, with an average of 2445 ind./10 cm2.In terms of vertical distribution, the abundance of meiofauna was 31.0%, 20.4%, 30.0%, 9.6% and 8.9% of the total in vertical layer of depth 0-1 cm, 1-2cm, 2-4 cm, 4-6 cm and 6-10 cm respectively.As for Particle size components, respectively 1.2%, 9.8%, 23.2%, 37.6% and 28.2% of meiofauna were retained on the sieves of 500 μm, 250 μm, 125 μm, 65 μm and 32 μm mesh openings respectively.(2) in deep sea stations: the total number of taxa was three.Nematode were the numerical predominant at 5 deep sea water stations, representing 98.90±1.42% of the total meiofauna abundance.Harpactoid copepods were the second, representing 0.89±1.06% of total abundance.Polycheata only appeared in station M07 of one replica.The abundance of meiofauna ranged between 235.29±89.10 ind./10cm2 in M03 station and 627.60±175.35 ind./10 cm2 in station M07, with an average of 407.06ind./10 cm2.There was reduced abundance trend with increasing depth from 393 m to 2300 m.For vertical distribution, the uppermost 0-1 cm layer comprised an average of 25.63%, 1-2 cm layer having 28.10%, 2-4 cm layer being 30.11%, 4-6 cm layer being 11.08% and 6-10cm layer being 5.08%.The maximum abundance of meiofauna was on 32μm sieve, accounting for 60.5±7.0% of the total, followed by 65 μm sieve, composing 31.9±4.2% of the total.