In the national aquarium of Denmark, Den Blå Planet, visitors admire the underwater world. | Photo: Guillaume Baviere, License: CC BY-SA 2.0 18. December 202116. December 2021 animal welfare, media-echo « back Den Blå Planet: How do zoo animals train? Published on servustv.com the 10.10.2021. The video provides insights into the training of the sea lions and sharks at the Den Blå Planet, the largest aquarium in Northern Europe, and explains why it is important. » to the full video Share this post