After a century away, #sturgeons return to Swedish waters https://phys.org/news/2024-06-century-sturgeons-swedish.html
"scientists in June embarked on a 10-year project to reintroduce the Atlantic #sturgeon to a cleaned-up river in the west of the country... The #fish lived in the river until the late 19th century, but gradually disappeared due to #overfishing and #pollution. Today, the river is much cleaner and conditions are again right for the sturgeon"