King Crab and Snow Crab in Norway

Two species of crabs that is not native to Norwegian waters has become big business.
The King Crab, or Kamchatka Crab, has even become a tourist attraction:

It is caught commercially in the waters off Finnmark and Troms County and has reached as far south along the coast as Lofoten Islands.
They have also spread northwards and is likely to reach Svalbard by 2030:

King crabs are not only a problem. They have also made some people in Finnmark very rich:
https://www.theguardian.com/environment/2020/dec/20/crab-22-how-norways-fisheries-got-rich-but-on-an-invasive-species

But the really big money maker is the Snow Crab:

Norwegian Snow crabbing boat Polar Pioneer leaving Tromsø for the Barents Sea:


Photo: Asimut

Newly converted snowcrabbing boat Vima passing Måløy on her way north to start the season in Jan. 2022:


Photo: Ivar Strømmen

Vima in Ålesund after the season, 12 June 2022:

Whats caused the appearance of these crabs?

They were fleeing the “Deadliest Catch” crews of the Bering Sea.

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It is all explained in the video and attachment in the OP.

Fine, then I summarize it;
The King Crabs was brought to Murmanskfjord in the 1960s and walked from there
The Snow Crabs like cold water and moved north due to global warming.

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