[js1138]

...transitional means from a fish, then a fish with fins turning into legs, then gills becomming both lungs as well as gills, then becomming more defined over time untill the gills are no longer needed and dissapear.

[Nathan Zachary]

Nice feet, where's the lungs? I catch plenty of catfish. they can live a long time out of water. just because a fish flips itself across short bits of land and go into other ponds doesn't mean it's evolving. In fact there is not even a hint of anyhing 'evolving' on that fih, whaich has been observed for hundreds of years.

[Junior]

Gills did not evolve into lungs. The lungs are a slightly modified flotation bladder.