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Lungfish are freshwater vertebrates belonging to the class Dipnoi. [1] Lungfish are best known for retaining ancestral characteristics within the Osteichthyes, including the ability to breathe air, and ancestral structures within Sarcopterygii, including the presence of lobed fins with a well-developed internal skeleton.
Australian lungfish are commonly found in deep pools of 3–10 m (9.8–32.8 ft) depth [14] and live in small groups under submerged logs, in dense banks of aquatic macrophytes, or in underwater caves formed by soil being washed away under tree roots on river banks. The lungfish is tolerant of cold, but prefers waters with temperatures in the ...
Others may breathe atmospheric air while remaining submerged, via breathing tubes or trapped air bubbles, though some aquatic insects may remain submerged indefinitely and respire using a plastron. A number of insects have an aquatic juvenile phase and an adult phase on land. In these case adaptions for life in water are lost at the final ecdysis
The South American lungfish is an extraordinary creature - in some sense, a living fossil. ... While other fish rely upon gills to breathe, lungfish also possess a pair of lung-like organs. It ...
Lungfish (Dipnoi): Six species have limb-like fins, and can breathe air.Some are obligate air breathers, meaning they will drown if not given access to breathe air. All but one species bury in the mud when the body of water they live in dries up, surviving up to two years until water returns.
Obligate air breathers, such as the African lungfish, are obligated to breathe air periodically or they suffocate. Facultative air breathers, such as the catfish Hypostomus plecostomus, only breathe air if they need to and can otherwise rely on their gills for oxygen. Most air breathing fish are facultative air breathers that avoid the ...
Furthermore, the African lungfish is commonly used for food consumption in many African regions. In Ugandan fish markets, African lungfish can frequently be found. According to some studies, Uganda caught between 15,000 and 22,000 tons of lungfish from 1976 to 1985, but this number decreased from 1985 to 1989.
The marbled lungfish is smooth, elongated, and cylindrical with deeply embedded scales. The tail is very long and has tapers at the end. They can reach a length of up to 2 m (6.6 ft). [1] The pectoral and pelvic fins are also very long and thin, almost spaghetti-like, used for gliding through the water.