MatsyaDx-BD: An image dataset of freshwater fish diseases from aquaculture farms in Bangladesh

MatsyaDx-BD is an image dataset of freshwater fish diseases collected from aquaculture farms in Rajshahi Division, Bangladesh. The dataset contains 2137 RGB images representing three commonly farmed freshwater fish species: Grass Carp (Ctenopharyngodon idella), Rohu (Labeo rohita), and Silver Carp (Hypophthalmichthys molitrix).

The images cover four health conditions observed in freshwater aquaculture systems: Bacterial Gill Disease (275 images), Bacterial Red Disease (653 images), Epizootic Ulcerative Syndrome (EUS, 332 images), and Healthy Fish (877 images). Fish body length ranges are: Grass Carp 20–44 cm, Rohu 23–40 cm, and Silver Carp 32–50 cm. All images were captured using a Samsung Galaxy S25 Ultra smartphone under natural aquaculture farm conditions, resulting in variations in lighting, background, and fish orientation.

The dataset is organized in a class-wise folder structure, where images are grouped according to fish health condition. It can support AI, computer vision, and IoT applications for automated disease detection, as well as aquaculture research and studies of regional disease patterns. The dataset is released under the Creative Commons Attribution 4.0 International (CC BY 4.0) license, allowing reuse with appropriate attribution.