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All three breeds of Lungfish fall into a hibernation state when water levels are low to none. The South American Lungfish digs a hole in the moist lower level of mud until the water returns. Its African cousin takes this state further. Its secretes a mucus like substance that turns into a leather sake around the fishes body. This sake hold the remaining water in the lower level of mud around its body keeping it moisturized. In this state their metabolism slows, allowing the fish to stay in such a state for up to 2 years. The Australian Lungfish simply waits out the drier weather in whatever remaining water is left in their pond.
The average life span of a Lungfish varies , but none are under 20 years of age, if conditions are adequate.
The Australian Lungfish has the highest recorded life span at 100 years, followed by the South American at 80+ years of life. The African Lungfish has the shortest recorded lifespan at only 20 + years.
The breeding habits of the Lungfish isn't spectacular. All spawn in the wet seasons of their regions. The only differences is the female South American typically lays her eggs at the bottom of their territory, much like a fish or frog. The Australian Lungfish creates a next from mud in it's shallow pond and leaves the male to protect the eggs until they hatch into fry. Fry generally are slow growing and take three weeks to hatch.
Kingdom: Animalia
Phylum: Chordata
Class: Sarcophterygii
Order: Neoceratodontidae
Family: Ceratodontidae
Genus: Lepidosiren (South American), Protoperus (African), and Neoceratodus (Australian)
Species: N/A
A Lungfish is just as the name portrays, Lungfish have a set or one lung allowing them to breath air when water is in short supply or oxygen levels are poor.
When born some Lungfish fry have a set of gills that fade as they grow older, and lungs become more prominent.