Monga Bay reported
Taxonomists described 309 new species of freshwater fish in 2025, according to a report released by SHOAL, the IUCN Freshwater Fish Specialist Group (FFSG) and the California Academy of Sciences(CAS). With nearly one new description each day of the year, the tally is the highest since 2017, and the third-highest since 1758, when scientists began keeping records.
The new fish species come from five continents and a diversity of habitats, including limestone caves, peat swamps, wetlands and rivers. Most are endemic and some are already at risk of extinction. Asia topped the list with 165 newly described fish species, followed by South America with 91, Africa with 30, North America with 20, and Europe with three.
Read more A fish a day: More than 300 freshwater species described in 2025
Read about one unusual new species at Discover Wildlife :
Natural History Wanderings 
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