A PLUS posted the video below on their website, showing a beluga whale, Juno, scaring two children as it comes at them.

 

According to the article it's a threat, but the kids are seemingly unaware of this threat which presents itself on the other side of the thick glass wall.

 

A viewer left the following comment on the video:

 

"This isn't some cute little game he's playing with the kids. He's doing what is called "jaw popping", which is a threat gesture meant to assert dominance. This is a very common and healthy behavior amongst multiple species of dolphins, whales, seals, etc. And in this case, he's bothered by the kids pressing up on the glass, perhaps because he thinks they're trying to intrude on his tank. Oh, and for those who are saying that he's trying to eat the kids, no, Belugas don't eat humans."

 

However, belugas are not typically known as aggressive animals. Indeed they are a favorite of marine mammal display facilities because of their otherworldly beauty, and their general docility around adults and children.
 

Phil Demers, a former trainer at Marineland, told Take Part that he has “received and witnessed many injuries by belugas. They’re big animals and can thrash with tremendous force when put in compromising and stressful situations.”

 

“I had a tooth go through my bottom lip when a beluga’s fluke struck me in the face like a right hook,” he said. “I’ve also seen belugas clamp down on trainers’ hands during a force feed medical procedure. That hurts.”