The African giant lungfish (Neoceratodus tuberculatus) is a species of lungfish of the genus Neoceratodus that originally lived in what is now Africa during the Cretaceous and was once extinct, but has since been brought back from extinction by SciiFii and introduced to the modern lakes and rivers across Africa to help boost biodiversity. This species lives in slow-flowing rivers and still water (including reservoirs) that have some aquatic vegetation present on banks. It occurs over mud, sand, or gravel bottoms. The African giant lungfish are commonly found in deep pools of depths between 3 and 10 meters and live in small groups under submerged logs, in dense banks of aquatic macrophytes, or in underwater caves formed by the removal of substrate under tree roots on river banks. The lungfish is tolerant of cold, but prefers waters with temperatures between 15 and 25 °C. The African giant lungfish is incapable of surviving complete desiccation of its habitat, although it can live out of water for several days if the surface of its skin is constantly moist. Unlike most of the African lungfish species (Protopterus) and just like Australian lungfish (Neoceratodus forsteri), it does not survive dry seasons by secreting a mucous cocoon and burying itself in the mud. It is much larger than the Australian lungfish, usually growing to be about 2 meters (6.5 feet) when fully grown, making it too large for most predators such as lions, hyenas, etc, to prey on if the African giant lungfish is fully grown, but the African tiamat is large enough to regularly prey on giant fish such as African giant lungfish. A distinctive characteristic of the African giant lungfish is the presence of a single dorsal lung, used to supplement the oxygen supply through the gills. During times of excessive activity, drought, or high temperatures (when water becomes deoxygenated), or when prevailing conditions inhibit normal functioning of the gills, the lungfish can rise to the surface and swallow air into its lung. More frequent air breathing is correlated with periods of greater activity at night when it uses the lung as a supplementary organ of respiration. The African giant lungfish is primarily nocturnal, and is essentially carnivorous. In captivity, it will feed on frogs, earthworms, pieces of meat, and pelleted food. In the wild, its prey includes frogs, tadpoles, fishes, a variety of invertebrates, and plant material. The African giant lungfish spawns and completes its entire lifecycle in freshwater systems. The age of first breeding is between 17 years for males and 22 years for females. After an elaborate courtship, the lungfish spawn in pairs, depositing large adhesive eggs amongst aquatic plants. They spawn from August until November, before the spring rains, in flowing streams that are at least a metre deep. The conservation status of the African giant lungfish is Least Concern due to successful conservation efforts and the African giant lungfish's wide range.
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