Ottawa is also paying half of what remains of Tarasenko’s $5 million salary for the entire season.
The 32-year-old forward won the Stanley Cup with St. Louis in 2019 and has 615 points in 732 career NHL games.
This season in bottom team Ottawa, there have been 41 points (17 goals+24 assists) in 57 games.
Clubmate with three Swedes
Florida fell in the Stanley Cup finals last season and is the leading scorer in the Eastern Conference so far this season.
Tarasenko will be teammates with the back duo Oliver Ekman Larsson and Gustav Forsling and the forward Kevin Stenlund in Florida.
The transfer window in the NHL closes on Friday evening, Swedish time.