The Arabian Sea and the Bay of Bengal are cul-de-sacs of the northern Indian Ocean, and they contain more than half of the world's Oxygen Minimum Zones (OMZs). The current study reviews the vast and advancing literature on the oceanographic settings that lead to distinct OMZs in the Arabian Sea and the Bay of Bengal and links them with the copepods thriving there, their status, and likely adaptations. The Arabian Sea has a thicker perennial subsurface OMZ (∼1000 m) than the Bay of Bengal (∼500 m), which is linked to high plankton production via upwelling and winter convection in the former and river influx and mesoscale eddies in the latter. Studies world over show that OMZs adversely affect the zooplankton community as their core always sustains reduced zooplankton biomass. Exclusive studies on copepods in the perennial OMZ in the northern Indian Ocean have been limited to the Arabian Sea so far, which showed that the calanoid copepod Lucicutia grandis is an indicator species of the OMZ lower boundary, whereas Calanoides natalis is a diapausing species in the OMZ. Studies also evidenced that many calanoids (Pleuromamma indica, Lucicutia longicornis, Rhincalanus nasutus, Paracalanus aculeatus, Eucalanus attenuatus, Euchaeta rimana, Subeucalanus subcrassus), cyclopoids (Oithona nana, Oncaea conifera, Oncaea subtilis, Saphirina), Harpacticoids (Microsetella sp., Aegisthus mucronatus) and Mormonilloids (Mormonilla minor) living in the perennial OMZ are either vertical migrators or having a patchy distribution between the epipelagic to the deeper OMZ stratum. These OMZ copepods are believed to have distinctive growth and reproductive traits that allow them to exist in the OMZs. Their high enzyme activity allows them to carry out vertical migration, their high lipid reserves allow them to stay alive in starving conditions, and their slow lifestyle reduces their energy consumption in deeper OMZs. Unlike the perennial OMZs in the Arabian Sea, copepods in the seasonal OMZs in the coastal upwelling zones are almost unexplored, except for a recent attempt that demonstrated that cyclopoids have better survival strategies there. The Arabian Sea and the Bay of Bengal around India have a strong seasonal exchange of their water masses, but how they influence and shape the copepod communities in these regions and the OMZs they harbour is completely unknown.

阿拉伯海和孟加拉湾是北印度洋的死胡同，它们包含了世界上一半以上的氧气最低区 (OMZ)。目前的研究回顾了有关导致阿拉伯海和孟加拉湾不同 OMZ 的海洋环境的大量和先进的文献，并将它们与在那里繁衍生息的桡足类、它们的状态和可能的适应联系起来。 阿拉伯海的常年地下 OMZ（~1000 m）比孟加拉湾（~500 m）厚，这与前者通过上升流和冬季对流以及后者的河流流入和中尺度涡流产生的高浮游生物产量有关。世界各地的研究表明，OMZ 对浮游动物群落产生不利影响，因为它们的核心始终维持着减少的浮游动物生物量。迄今为止，对印度洋北部常年 OMZ 中桡足类的独家研究仅限于阿拉伯海，这表明 Calanoid 桡足类Lucicutia grandis是 OMZ 下界的指示物种，而Calanoides natalis是滞育物种。奥姆兹。研究还证明，许多calanoids ( Pleuromamma indica ,Lucicutia longicornis、Rhincalanus nasutus、Paracalanus aculeatus、Eucalanus attenuatus、Euchaeta rimana、Subeucalanus subcrassus）、类圆球藻（Oithona nana、Oncaea conifera、Oncaea subtilis、Saphirina）、Harpacticoids（Microsetella sp.、Aegisthus Morcronatus）和Mormonilloids) 生活在常年 OMZ 的要么是垂直迁移者，要么是在上层到更深的 OMZ 地层之间分布不均。这些 OMZ 桡足类被认为具有独特的生长和繁殖特征，使它们能够存在于 OMZ 中。它们的高酶活性使它们能够进行垂直迁移，它们的高脂质储备使它们能够在饥饿的条件下保持活力，它们缓慢的生活方式减少了它们在更深的 OMZ 中的能量消耗。与阿拉伯海的常年 OMZ 不同，沿海上升流区的季节性 OMZ 中的桡足类动物几乎没有被探索过，除了最近的一次尝试表明，旋臂动物在那里有更好的生存策略。印度周围的阿拉伯海和孟加拉湾的水团具有强烈的季节性交换，但它们如何影响和塑造 这些地区的桡足类群落和它们所栖息的 OMZ 是完全未知的。