The morphological, phenological and ecological characteristics of shallow coral reefs have been widely studied, but only recently have mesophotic corals begun to be studied. Very little is known about these ecosystems and their associated communities, such as the zooplankton community, which constitutes a food source for reefs and for the organisms that inhabit them. In the present study, changes in zooplankton composition were characterised during two hydroclimatic periods in a mesophotic environment of the submarine mountain Bajo Frijol, in Corales de Profundidad National Natural Park, Colombia. Zooplankton was collected using a portable pumping device, which contained three collectors of differing mesh sizes; this allowed the capture of zooplankton ranging in size from 45 to 300 $\mathrm{\mu }$m. Temperature, conductivity, oxygen and pH were obtained and complemented with MODIS AQUA satellite information. In this ecosystem, the zooplankton organisms with the greatest richness and abundance were small-sized copepods, radiolarians and tintinnids. The oceanography of the area results in greater zooplankton abundance, richness, and diversity in June when the coastal current allows greater chlorophyll-a concentrations in the area and smaller organisms are favoured by greater retention within the corals of the mesophotic system. The biodiversity reported for Bajo Frijol is the first detailed approach to the community of mesophotic coral reefs in the Colombian Caribbean Sea, contributing to new records to the Global Biodiversity Information Facility.

浅层珊瑚礁的形态、物候和生态特征已被广泛研究，但直到最近才开始研究中光珊瑚。人们对这些生态系统及其相关群落知之甚少，例如浮游动物群落，它构成了珊瑚礁和栖息在其中的生物的食物来源。在本研究中，浮游动物组成的变化在哥伦比亚科拉莱斯深渊国家自然公园的海底山 Bajo Frijol 的中光环境中的两个水文气候时期得到表征。浮游动物是使用便携式抽水装置收集的，其中包含三个不同网孔大小的收集器；这允许捕获大小从 45 到 300 不等的浮游动物$\mathrm{\mu }$米。获得温度、电导率、氧气和 pH 值，并辅以 MODIS AQUA 卫星信息。在这个生态系统中，最丰富和丰富的浮游动物生物是小型桡足类、放射虫和丁丁目动物。该地区的海洋学导致 6 月份浮游动物的丰度、丰富度和多样性增加，当时沿海洋流允许该地区叶绿素a浓度更高，较小的生物更容易滞留在中光系统的珊瑚中。为 Bajo Frijol 报告的生物多样性是哥伦比亚加勒比海中光珊瑚礁群落的第一个详细方法，为全球生物多样性信息设施的新记录做出了贡献。