Our lakes are teeming with parasites. Why that's good… and bad

If you're a fishing enthusiast, you may have already noticed abnormalities or parasites in the wild fish you catch. In fact, the fish we commonly find in our lakes, such as bass or trout, harbor several species of parasites. Although parasites are a natural part of ecosystems, their presence can potentially have serious consequences. But what are parasites? And what impact do these mysterious creatures have on our lakes?