Interesting, the wiki page notes: > The sea has a severe climate with temperatures below 0 °C (32 °F) over more than nine months per year, low water salinity

Interesting, the wiki page notes: > The sea has a severe climate with temperatures below 0 °C (32 °F) over more than nine months per year, low water salinity Given the low salinity and below 0 °C for so long, you would expect it to be frozen most of the time.