Quote Originally Posted by TimmyG View Post
Um..Fish don't have lungs...they have gills
Yes they have gills, that's how they pull the Oxygen from the water, but If you've ever gutted shark, you'd clearly see that they have lungs as part of their swim bladers. While it's not mentioned in many high school texts, there are actually many modern species of fish (not mammals, but real fish) which have lungs as well as gills. For instance, among the so-called ‘higher’ bony fish (the teleosts) many species of electric fish have them. Of the chondrostei, the so-called ‘primitive’ bony fish, the Polypterus is so dependent on its paired lungs that this fish can drown if prevented from surfacing.