Climatic stability over millions of years has allowed ancient and isolated freshwater fishes to flourish in areas such as the 356,000 square kilometers from Shark Bay to Esperance in southwest Western Australia. Climatic stability over millions of years has allowed ancient and isolated freshwater fishes to flourish in areas such as the 356,000 square kilometers from Shark Bay to Esperance in southwest Western Australia. Plants & Animals Ecology Phys.org – latest science and technology news stories