A fish previously declared extinct has been released back into the wild in Australia. The olive perchlet, a small oval-shaped fish with large eyes, was considered extinct in Victoria, Australia, in ...

Along a nine-mile stretch of river between two waterfalls in the Australian rainforest lives a tiny fish that’s been there ...

A critically endangered fish in Australia's Mary River seems to have a workable approach to deal with invasive tilapia that's competing for food and habitat. The cod's response to the overcrowding? If ...

Some species officially bid us farewell this year. They may have long been gone, but following more recent assessments, ...