Articles and Research Papers about Fish becoming addicted to Pharmaceuticals by the way of them entering our Waterways vis a vis our bodies not breaking them down each time we excrete, and Wastewater Treatment Facilities not being designed to filter them out:

https://health.wusf.usf.edu/health-news-florida/2023-04-05/pharmaceuticals-found-in-popular-florida-fish-from-coast-to-coast

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6097189/