If you haven’t yet seen Blackfish, you need to watch it. Right now.

It tells of the story of Tillikum, an orca who has been kept in captivity by Sea World in Orlando, Florida. He went on to attack and kill his trainer, Dawn Brancheau in 2010.

SeaWorld put it down to the animal accidentally grabbing Dawn’s pony tail and dragging her into the water. But what if it’s more than that?

If you were kept in a bathtub for 25 years, don’t you think you’d get a little psychotic?

Blackfish looks into the behaviour of whales in captivity and investigates whether SeaWorld has been covering things up to protect its profits.

The documentary questions whether they really educating us about marine life or are they just using these wild animals for entertainment and financial purposes.

It’s a truly eye-opening and distressing look into animals in captivity. It will truly make you never want to watch any sort of animal show again.

Since it’s release, SeaWorld has suffered huge blows. They lost $15.9 million in 2014, visitor numbers were down significantly and their chief executive James Atchison resigned.

Watch Blackfish on iTunes here