Countless humpback whales have jumped to the surface of the water while catching prey near the Norwegian coast in the past few days.
Travelers and Norwegian people witnessed the first whale's collective performance in 2010. Then the same phenomenon continued in the following years.
The study of humpback whales confirms that it is unusual for them to come close to the shore to tumble.
Humpback whales often work together to encircle small fishes and destroy them.
Being fascinated with prey, some humpback whales do not know that they are only about 10m away from the shore.
Seabirds and killer whales also join the humpback whale's party.
About 1,000 humpback whales feed in Norwegian waters and Barents Sea before moving south to breed.
Humpback whales will operate near Tromso city until next January.
