A great short review of pharmaceutical contamination on fish. Our waters are becoming polluted with human drugs and this study looked at the possible results. 
 
Fish species around the globe are at risk due to the ever-increasing levels of pharmaceutical contamination that is making its way into water systems, according to collaborative research conducted by The University of Western Australia, Monash University, the Swedish University of Agricultural Sciences, and New York University.
Pharmaceutical drugs can make their way into water systems via urine and feces treated at sewage treatment plants. These plants rarely screen for drugs, and detectable levels of pharmaceutical contamination may remain in the water that is then released into streams and rivers by water outlets by them.
One such contaminant is the common antidepressant Prozac, generically known as fluoxetine.
 
Zombie Fish: Antidepressant Prozac Bizarrely Changes Guppy Fish Behaviour | IFLScience