Lungfishes are a subclass of bony fishes that appeared during the Devonian period, approximately 410 million years ago, with certain species surviving to this day. These fishes possess a dual respiratory system, aquatic (via gills) and aerial (via lungs). They are omnivorous, feeding on other fish, insects, crustaceans, amphibians, and plants. Due to their ability to breathe both in water and air, they can survive periods of drought when water evaporates and they remain trapped in small puddles, breathing air until the drought passes and the rains return.
