Possible Applications
The list of possible applications, when an animal of this caliber is caught, is enormous. People can use these animals to spy on other countries, get intel, follow shops and so much more. They can even be trained to attack other people.
This is a bit difficult with beluga whales because they are smart and they are not aggressive. But, imagine if a shark was in the position of our beluga whale. The worst thing here is that there are no limits on how and for what people can train animals to do.