Compiled inventories with information on the distribution, status and impacts of invasive alien species are essential for the study, management and monitoring of biological invasions. Despite their great importance, such studies are lacking for alien freshwater fish species in Brazil. Therefore, our aim was to improve the knowledge of the regional richness of alien species, leading to the closing of existing regional data gaps. We performed extensive bibliographic research and consulted with experts to update the list of freshwater alien fishes of six watersheds in southeastern Brazil (Upper Paraná, Paraíba do Sul, São Francisco, Mucuri, Jequitinhonha and Doce), and provided information on species invasion status, environmental impact category, pathway of introduction, origin and species taxonomic attributes. We compiled a list of 201 alien fish species introduced in the six watersheds (to 2019) through six pathways: aquarium trade, geographical barrier breach (after the flooding of a natural barrier by the construction of a hydroelectric power plant), aquaculture, stocking for sport fishing, live bait and biological control. The invasion status of the species varied among watersheds, and it was possible to characterize the impact of only 11 species. Our results show there are detailed data on the distribution and population status of alien fishes in Brazil, but also a lack of ecological studies on the impacts of such introductions. Research on the impacts of alien fish species on recipient ecosystems are urgently needed owing to the present high number and wide distribution of invasive species and lack of knowledge on the consequences of these invasions.

具有关于外来侵入物种的分布，状况和影响的信息的汇编清单对于研究，管理和监测生物入侵至关重要。尽管它们非常重要，但巴西尚缺乏针对外来淡水鱼类物种的此类研究。因此，我们的目的是提高对外来物种区域丰富性的认识，从而消除现有的区域数据空白。我们进行了广泛的书目研究，并与专家咨询，以更新巴西东南部六个水域（上巴拉那州，南帕拉依巴州，圣弗朗西斯科州，穆库里，杰基丁洪哈和多西）的淡水外来鱼类名单，并提供了有关物种入侵状况，环境的信息。影响类别，引入途径，起源和物种分类属性。我们汇总了通过六个途径引入六个流域（到2019年）的201种外来鱼类物种的清单：水族馆贸易，地理障碍突破（在建造水力发电厂淹没自然屏障之后），水产养殖，运动钓鱼，活饵和生物防治。该物种在流域之间的入侵状态各不相同，并且有可能描述仅11种物种的影响。我们的结果表明，有关于巴西外来鱼类分布和种群状况的详细数据，但也缺乏关于此类引进影响的生态研究。