Visfauna - Juvenile and adult fishes in riparian habitats along the river Yser in Flanders, Belgium is a species occurrence dataset published by the Research Institute for Nature and Forest (INBO). The dataset contains over 5,800 fish occurrences sampled in 2008 in riparian habitats along the river Yser. The dataset includes 22 fish species. The data are collected to evaluate the role of restored riparian habitats for the spawning and nursery of juvenile fish and are discussed in Mouton et al. 2011. The dataset also includes the length of the caught fishes. Issues with the dataset can be reported at https://github.com/LifeWatchINBO/data-publication/tree/master/datasets/visfauna-ijzer-occurrences To allow anyone to use this dataset, we have released the data to the public domain under a Creative Commons Zero waiver (http://creativecommons.org/publicdomain/zero/1.0/). We would appreciate it however if you read and follow these norms for data use (http://www.inbo.be/en/norms-for-data-use) and provide a link to the original dataset (https://doi.org/10.15468/keplkx) whenever possible. If you use these data for a scientific paper, please cite the dataset following the applicable citation norms and/or consider us for co-authorship. We are always interested to know how you have used or visualized the data, or to provide more information, so please contact us via the contact information provided in the metadata, opendata@inbo.be or https://twitter.com/LifeWatchINBO.