This study investigated the abundance and characteristics of microplastics in commercial fish species from the Bay of Bengal, off the coast of Bangladesh. The gastrointestinal tracts of 100 individuals from 10 species of commercial marine fish were examined for microplastics. Microplastics were detected in all species. A total of 215 microplastics were recovered with an average abundance in the range of 2.2 ± 0.89 microplastics per individual. Five types of microplastics were found: fibers, films, fragments, foams, and granules, which accounted for 53.4%, 40%, 3.3%, 1.9%, and 1.4% of the total, respectively. Among the identified microplastics, green (39%) was the most dominant color, and < $500\mathrm{\mu }\mathrm{m}$ (85%) size was the most dominant. Polymers were polyethylene (55%), polypropylene (33%), polyester (6%), polyurethane (2%), ethylene propylene diene monomer (2%), and styrene butadiene rubber (2%). The study results show the common incident of microplastics in fish and open the way for further studies to better explain factors influencing the occurrence of microplastics in fish in the Bay of Bengal and risk assessment.

这项研究调查了孟加拉湾外的孟加拉湾商业鱼类中微量塑料的丰度和特征。检查了来自10种商品海水鱼的100个人的胃肠道中的微塑料。在所有物种中均检测到微塑料。总共回收了215种微塑料，每个个体的平均丰度为2.2±0.89微塑料。发现了五种类型的微塑料：纤维，薄膜，碎片，泡沫和颗粒，分别占总数的53.4％，40％，3.3％，1.9％和1.4％。在确定的微塑料中，绿色（39％）是最主要的颜色，而<$500\mathrm{\mu }\mathrm{米}$（85％）的尺寸是最主要的。聚合物为聚乙烯（55％），聚丙烯（33％），聚酯（6％），聚氨酯（2％），乙丙二烯单体（2％）和丁苯橡胶（2％）。研究结果显示了鱼类中微量塑料的常见事件，为进一步研究更好地解释影响孟加拉湾鱼类中微量塑料发生的因素和风险评估开辟了道路。