The fossils of several small, slender freshwater fish, embedded in an iron-rich mineral called goethite have been discovered at the McGraths Flat fossil site in central New South Wales. The unusual level of detail, including the shape of the fish and position of its bones and fins, revealed a lot about the species, called Ferruaspis brocksi, described in the Journal of Vertebrate Palaeontology.

• ‘It’s a history lesson’: fossil fish up to 16m years old found perfectly preserved in central NSW