We have published a paper:

Alexander E, Cai LT, Fuchs S, Hladnik TC, Zhang Y, Subramanian V, Guilbeault NC, Vijayakumar C, Arunachalam M, Juntti SA, Thiele TR, Arrenberg AB, Cooper EA
Optic flow in the natural habitats of zebrafish supports spatial biases in visual self-motion estimation
Current Biology, Online Publication, Nov 2, 2022, doi: https://doi.org/10.1016/j.cub.2022.10.009
see also: https://news.northwestern.edu/stories/2022/10/why-fish-look-down-when-they-swim/