The Platypus Frogs were two species of aquatic frogs, once found in Queensland. They were also known as the gastric-brooding frog. The female swallows her eggs as soon as they are fertilized. Each egg is surrounded by a substance that inhibits the production of hydrochloric acid by the stomach - saving them from digestion - and once hatched the tadpoles exude the substance through their gills. During their growth, she does not eat, and when they are fully formed froglets, she regurgitates them one at a time. The last Platypus frog was seen in 1981, one of the early casualties to the chytrid fungus that is now destroying frog populations all over the world.
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