New research shows that the class of pesticides -- neonicotinoids -- used in conventional agriculture that is infamous for decimating pollinator populations can also have negative impacts on fish health. A new study in 2019 shows the consequences of neonicotinoids reach beyond insects like bees and are causing fish populations to crash. Researchers found that neonicotinoid applications to watersheds have caused important food sources for freshwater fish to crash, leading to significantly smaller fish populations.