Not only do fish pee, but their pee gives other animals in the ocean what they need to survive.
That’s what I found out from my friend, Cori Kane, a marine biologist who earned her doctoral degree in biological sciences at Washington State University. She knows a lot about coral reefs in our oceans. Coral reefs look like a ridge made of rock, but they are actually made up of living things.
Corals need a few things to survive. They need clear, warm water, sunlight, and nutrients, a kind of food that helps them grow. There aren’t usually a lot of nutrients in water near coral reefs. Luckily, there are a lot of nutrients in fish pee—and a lot of fish in the reef.