This is a 2015 video called Overview of Saaee Aquaculture´s Beluga Sturgeon Farm at the Caspian Sea in Iran.
From daily The Morning Star in Britain:
Halp! Harald’s gone missing
Tuesday 31 May 2011
A sturgeon called Harald who was part of a Romanian scheme to protect the endangered species has gone missing, researchers said today.
Harald, a beluga sturgeon, had been wired up to a satellite transmitter in 2009.
Scientists hoped that by tracking his movements they could learn the causes of the sturgeons’ decline.
[Beluga] Sturgeons can live for over 100 years and grow up to eight metres in length.
They have been prized for their meat and caviar since Roman times, but their numbers have plummeted since 1989 due to an explosion in illegal poaching following the collapse the Soviet bloc.