Tuna, swordfish, and some other species of sharks have some new adaptions because it evolved in some sort of way. Now these fish that I had mentioned have became warm-blooded, they can now heat themselves up where they are warmer than the temperature of the water they live in. Did you know that tuna, salmon and jacks can swim up to 10 to 20 body lengths a second? Eels can do about the same speed to, the adaptions on these fish have changed a lot over time, but there is more that we haven’t figured out yet. Lungfish have similar lungs to tetrapods, also gouramis has a different structure of lungs that are called labyrinth, it works the same way as a lungfish’s lungs. A seahorse’s body is very un-fish like, because the shape of it is not like
