Do Fish Get Thirsty and Do They Need to Drink Water?

The video explores the concept of thirst in animals, focusing on fish. It explains how land animals experience thirst as a drive to maintain water and salt balance, known as homeostasis. Fish, however, have different mechanisms. Osmoconformers like hagfish match their internal salt levels with their environment, while osmoregulators like most fish maintain different internal concentrations. Freshwater fish absorb water through osmosis and excrete excess, while saltwater fish drink water and excrete salt. Some fish, like salmon, adapt to both environments. Fish don't feel thirst like land animals, as they live in water and manage hydration differently.

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