|Mr. Purple Cat Esq. - 2021-01-17 |
Apparently swim-bladders and lungs evolved from the same organ that kind of did both jobs.
Lungs are useful for a fish cus theres waaaaaaay higher concentration of oxygen in the air than in the sea and its easier to get.
Thats why aquatic mammals like whales and dolphins can *dominate* fish so badly. They can get way more oxygen and run a faster metabolism, the classic mammalian strategy of just being a super charged turbo killin' machine!