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Maeotias
''Maeotias'' is a genus of jellyfish in the family Olindiidae. It is a monotypic genus and the only species is ''Maeotias marginata'', commonly known as the Black Sea jellyfish or brackish water hydromedusa and often referred to as ''Maeotias inexpectata'' in the literature. It was first described from the Don and Kuban estuaries of the Sea of Azov (which was called the Lake of Maeotis in antiquity), and also occurs in the Black Sea, all of which are areas of low salinity. It has been recorded in several other estuarine locations around the world and is regarded as an invasive species. ==Description== ''M. marginata'' is a small jellyfish with a bell diameter of up to . It is hemispherical in shape and the gonads hang from the four distinctive radial canals. The marginal ring canal has 50 short centripetal canals branching from it with a dense marginal fringe of about 600 short trailing tentacles. This jellyfish is opaque white with a slightly reddish tinge near the bell margin.〔(【引用サイトリンク】title=Black Sea Jellyfish )〕〔
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