Marine algae Codium fragile introduced in the southern Barents Sea. Photo: seaweedinsustry.com

During the last half century, 2 major crab species were introduced to the Barents Sea: red king crab Paralithodes camtschaticus in the 1960s; and snow crab Chionoecetes opilio in the 1990s. Early this century(2000), species from the southern boreal areas have expanded northward to appear in the Barents Sea, including the snake pipefish Entelurus aequoreus, snail ray Dipturus linteus, whiting Merlangius merlangus, grey gurnard Eutrigla gurnardus, and megrim Lepidorhombus whiffiagonis.

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