How Do Fish Breathe Underwater?

🕐 3 min 54 sec 👦 Ages 4–5 🌍 English
Join Koko and Owlo as they explore how fish breathe underwater, uncovering the magic of gills and nature's wonders!
Understand how fish breathe using gills Learn the difference between fish and human breathing Encourage curiosity about nature and science
📖 Story Script
                    Koko:
                    Owlo, Owlo! I have the biggest question ever. I went to the pond with my mom today!
                
                    Owlo:
                    Oh, how lovely, Koko! The pond near the big willow tree is so beautiful this time of year.
                
                    Koko:
                    Yes, that one! And I saw fish swimming around, and I watched them for so long. They never came up for air. Not even once!
                
                    Owlo:
                    That is quite an observation, Koko. You were paying very close attention.
                
                    Koko:
                    But how do they breathe? They stay underwater the whole time. I can't breathe underwater. I tried holding my breath and I lasted maybe five seconds.
                
                    Owlo:
                    Well, fish have a very special secret. They breathe in a completely different way than we do.
                
                    Koko:
                    A secret? Tell me, tell me!
                
                    Owlo:
                    You know how you breathe air through your nose and mouth? Fish can't do that. They breathe through something called gills.
                
                    Koko:
                    Gills? What are those?
                
                    Owlo:
                    Gills are like little breathing doors on the sides of a fish's head. Have you ever noticed those small slits near a fish's cheeks?
                
                    Koko:
                    Oh! I think I saw those on the fish today. I thought they were just decoration.
                
                    Owlo:
                    That is a funny thought, Koko. But they are actually the most important part. Let me show you something in the science lab.
                
                    Owlo:
                    Here, look at this picture of a fish. See those lines on the side of its head? Those are the gills.
                
                    Koko:
                    Oh wow, they look like tiny little curtains.
                
                    Owlo:
                    What a wonderful way to describe them! Now, here is how they work. When a fish opens its mouth, it swallows a gulp of water.
                
                    Koko:
                    It drinks the water? That sounds like a lot of water to drink.
                
                    Owlo:
                    It does not drink it, no. The water flows in through the mouth and then passes over the gills. The gills grab the oxygen hiding inside the water.
                
                    Koko:
                    Wait, there is oxygen inside water? I thought oxygen was just in the air!
                
                    Owlo:
                    Oxygen is in both places, actually. Tiny bits of oxygen are mixed into the water, just like bubbles in a fizzy drink. The gills are very good at finding it.
                
                    Koko:
                    So the gills pull out the oxygen, and then what happens to the water?
                
                    Owlo:
                    The water flows right back out through the gill slits on the sides of the fish's head. In, grab the oxygen, and out it goes.
                
                    Koko:
                    That is so cool. It is like a little breathing machine built right into the fish.
                
                    Owlo:
                    That is exactly what it is, Koko. A perfectly built breathing machine. Fish have had gills for millions and millions of years.
                
                    Koko:
                    So fish could never come live on land with us? Because there are no gills for air?
                
                    Owlo:
                    Most fish cannot, that is right. Their gills work for water, not air. Just like our lungs work for air, not water. Everyone has the right tool for their home.
                
                    Koko:
                    I like that. Every animal has the right tool. Like how I have really good ears for listening to you.
                
                    Owlo:
                    And you use them very well. Now, I think you are ready to tell me what you learned today. Can you give me a little summary?
                
                    Koko:
                    Okay! So, fish breathe using gills, not lungs like me. The fish swallows water, and the gills grab the oxygen that is hiding inside. Then the water goes back out through the sides of its head. Fish have been doing this for millions of years, which means they are very, very good at it. Way better than me holding my breath for five seconds.
                
                    Owlo:
                    That was a perfect summary, Koko. I am very proud of you today.
                
                    Koko:
                    Next time I go to the pond, I am going to look really closely at the gills. And maybe next we can learn why some fish are so colorful. That is another mystery I need solved!
                
                    Owlo:
                    I love the way your mind works, Koko. The pond is full of mysteries, and we will explore every single one.