Do Fish Pee?

The video explores the drinking habits of fish, explaining that freshwater fish do not drink water, while saltwater fish do. It delves into the concept of osmosis and how fish maintain water balance. Saltwater fish drink saltwater and expel excess salt through their gills, producing minimal urine. Freshwater fish, on the other hand, constantly expel water to prevent their cells from bursting. The video also highlights unique adaptations in fish like salmon and sharks, and discusses evolutionary insights related to salt balance in living organisms.

What new insight or understanding did you gain from this video?