Coregonus fera, commonly called the true fera, is a presumed extinct freshwater fish from Lake Geneva in Switzerland and France.
Description
The fera is a freshwater whitefish that typically grows to between 35 and 40 centimeters in length. ==Biology==
Biology
The true fera lived at the bottom of lakes, where it fed on zooplankton and spawned between February and mid-March. ==Extinction==
Extinction
Together with the similarly extinct gravenche (Coregonus hiemalis), the fera was one of the most caught freshwater fishes in Lake Geneva. In 1890, these two fishes constituted 68% of the total captures in the lake. ==References==