Answer :
Aristotle is most noted for being a Greek naturalist who proposed the function of gills in fish. He was even noted for his detailed research on different marine animals. As he considered marine life to be more diverse than the territorial one, Aristotle worked on several marine species traits.
He was the one who initially dealt with different aspects of the life of marine inhabitants. Aristotle did detailed research on the body structure of the marine and freshwater animals and noted that gills were the unique feature in fishes where the exchange of gases take place.
The gills in fish are unique organ that perform the same actions as lungs do in humans. They process dissolved oxygen from water and exhale carbon dioxide.
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