Continental shelf and upper slope fishes are important global resources which have significant economic and biodiversity values. Understanding the drivers of their abundance and distribution are fundamental to guide sustainable fisheries management arrangements. Deepwater demersal fish assemblages were sampled between depths of 91–570 m at six locations along the Western Australian coastline spanning 17° of latitude (i.e. 17–34°S at the Rowley Shoals, Montebello Islands, Ningaloo Reef, Abrolhos Islands, Perth Canyon and South West Capes) using Baited Remote Underwater Stereo-Video systems (stereo-BRUVs, n = 417 deployments). A total of 5965 individual fishes were identified belonging to 252 species and 92 families. Assemblage composition data were modelled against in-situ habitat data, temperature, salinity, current speed, and current direction. Multivariate statistical analyses revealed that fish assemblage composition was predominantly influenced by latitude (9.5% of variation), depth (7.3%) and salinity (7.2%). Three distinct assemblages were defined in response to latitude; a tropical, a sub-tropical and a southern temperate bioregion. Species richness declined with increasing latitude, and average biomass was highest in the southern bioregion. A mid-depth peak in biomass and lengths indicated the dominance of meso-predator species in the 300–399 m depth range. The information provided by this study on the factors influencing the abundance and distribution of fish assemblages over an exceptionally broad depth and latitudinal range along a continuous coastline will be useful for predicting the effects of future climate shifts on this and similar teleost species occupying tropical and temperate oceans elsewhere.

大陆架和上坡鱼类是重要的全球资源，具有重要的经济和生物多样性价值。了解其数量和分布的驱动因素是指导可持续渔业管理安排的基础。在西澳大利亚州海岸线沿纬度17°（在Rowley浅滩，Montebello群岛，Ningaloo礁石，Abrolhos群岛，珀斯峡谷和西南开普）使用诱饵远程水下视频系统（立体声BRUV， n = 417个部署）。总共鉴定出5 965条个体鱼，它们属于252种92个科。组合物组成数据是针对原地栖息地数据，温度，盐度，当前速度和当前方向建模的。多变量统计分析表明，鱼群组成主要受纬度（变化的9.5％），深度（7.3％）和盐度（7.2％）的影响。根据纬度定义了三个不同的组合。热带，亚热带和南部温带生物区。物种丰富度随着纬度的增加而下降，南部生物区的平均生物量最高。生物量和长度的中间深度峰表明，中深度捕食性物种在300–399 m深度范围内占优势。