Instead of gills, these fish use a rudimentary lung to obtain oxygen and are "air breathers". They have gills too, which they also use but can in fact drown if deprived of a source of air.
Many related families
Shorefishes, pond and creek fish.
Carp, Minnows, Barbs
The egg laying tooth-carps ("Killifish") and the live bearing tooth-carps ("Livebearers").
Gobies and sleepers
Taxonomy of the Percidae