For example, Australia has 40 galaxiid species, scaleless native fish shaped like slender sausages that grow to less than 15cm. But 31 of these are threatened with extinction – and rainbow and ...

In landlocked Arizona, where the Colorado River crisis has put water use under a microscope, a new inland desert fish farm is growing barramundi — a tropical species native to Australia.

A study of shallow-water fish communities on rocky reefs in south-eastern Australia has found climate change is helping tropical fish species invade temperate Australian waters.