What is this?
Gas exchange in fish is how they get the oxygen they need to live from the water around them. They use special body parts called gills to take oxygen out of the water and release a waste gas called carbon dioxide. This process allows fish to breathe and survive underwater.
Key Parts to Explore
Mouth
Fish open their mouth to take in water, which then flows over their gills.
Gill Cover
This hard flap protects the soft, feathery gills underneath it.
Gills
These red, feathery structures are where the fish actually takes oxygen from the water.
Blood Vessels
Tiny tubes inside the gills pick up oxygen and drop off carbon dioxide into the water.
Did You Know?
Imagine if you could breathe underwater just by drinking water and filtering out the oxygen â that's kind of how fish do it!
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