枝角类（Cladocera）又简称“溞类”，水溞（注：该字读作zǎo，为早期水生生物学家自创新字，目前正确读音还未收入而只能借用sāo打字），俗称红虫，属无脊椎动物甲壳纲鳃足亚纲枝角目。其广泛分布于淡水、海水和内陆半咸水中，可以作为鱼类的饵料。 枝角类内部由消化系统、循环系统、呼吸系统、排泄系统、神经系统、生殖系统组成。温度和食物浓度对它的生长繁殖有影响。
Research towards Cladocera could be dated back to the early period of 18th century. The early reports on Cladocera were limited in the description of the external morphology.
对枝角类的研究始于18世纪初,早期关于枝角类的报道仅限于外部形态描述。
参考来源 - 隆线溞[Daphnia（Ctenodaphnia）carinata]生殖和发育的研究The sequence of the dominant species succession was cladocera→rotifer→nauplius and cyclopoida→oligochaeta and nematode.
种类演替顺序为:枝角类→轮虫→无节幼体和剑水蚤→寡毛类和线虫。
参考来源 - 生物活性炭滤池无脊椎动物群落分析及控制技术·2,447,543篇论文数据，部分数据来源于NoteExpress
有毒微囊藻还可抑制这两种枝角类的滤食率。
M. aeruginosa inhibited the feeding rates of the two cladocerans.
报告了对哈尔滨地区40多处水域中淡水枝角类的调查结果。
The paper reports the results of an investigation on the freshwater cladocera, which living in more than 40 water points from Harbin area, northeast China.
许多重要的变化被发现在轮虫，枝角类和桡足类群体的组成中。
Several significant changes were found in the composition of the rotifer, cladoceran and copepod assemblages.
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