This was the Free Republic thread a few years ago. Keyword was Norway, I believe
https://freerepublic.com/focus/f-chat/1680448/posts
_____________
Invasive Arctic crab species in Norway are expanding to new shores
Populations of king and snow crabs, neither of which is native to the Barents Sea, have exploded there in recent years, and begun to spread north and south.
By Atle Staalesen, The Independent Barents Observer -November 14, 20195975 https://www.arctictoday.com/invasive-arctic-crab-species-in-norway-are-expanding-to-new-shores/#:~:text=Invasive%20Arctic%20crab%20species%20in%20Norway%20are%20expanding,and%20begun%20to%20spread%20north%20and%20south.%20By
King crabs, which aren’t native to the region, have conquered the Barents Sea and will continue to expand north- and southwards. The crabs might ultimately make it south to the UK and north to Svalbard, according to researchers.
Before 1960, the fishermen that sailed in the Barents Sea knew little about crabs. Then, developments unfolded that ultimately altered marine life on the far northern sea bottom.
Soviet experiment
In fall 1960, Soviet marine biologist Yuri Orlov successfully moved nine female king crabs from Vladivostok to Murmansk. In the following 10 years, another 3,000 crabs were moved the Kola Bay. Then, a thousand more in the 1970s.
The animals found few competitors and comfortable living in their new northern habitat and quickly multiplied.
“It turned out that the invader crab became significantly bigger and more fertile than its ancestor,” Orlov said in an interview in 2016.
Thanks.
Judging by the video I recall from the thread it’d take a while to fish those things out.