Fish must be released into good quality water, with suitable habitat and lots of food. These conditions have been quite rare in Murray Darling rivers in recent years.
The EU continues to enter into fresh agreements with countries, despite evidence of serious population declines in the species of interest.
Polar regions may be becoming more profitable, but these "benefits" come with far more severe costs.
Our new invention tackles one of the greatest impediments to fish migration in Australia: culverts, those tunnels or drains often found under roads.
The 2016 heatwave that caused mass bleaching on the Great Barrier Reef didn't just kill corals - it also significantly changed the makeup of fish communities that call these reefs home.
Animals shed bits of DNA as they go about their lives. A new study of the Hudson River estuary tracked spring migration of ocean fish by collecting water samples and seeing whose DNA was present when.
The fisheries sector in West Africa is beset with serious challenges including over-fishing and, in particular, illegal fishing.