Animal no longer in barge: Humpback whale released in the North Sea:

A rescue can only be spoken of once the whale is back in the North Atlantic and has survived there long-term; its skin has fully recovered; it is once again able to forage for food on its own and gaining weight; and it is behaving according to its natural behavior.

— Whale and Dolphin Conservation (WDC) stated in a release regarding rescue criteria that a true rescue is only meaningful once the whale is back in the North Atlantic, survives long-term there, its skin has fully recovered, it can forage on its own and gain weight, and it is behaving according to its natural tendencies.