If you have time, I hope you are able to watch Chasing Coral on Netflix. It's the best storytelling so far about coral reefs dying across the planet from ocean warming.
No one I know who has gone scuba diving has emerged from the ocean unchanged, and nearly every underwater photographer I know has become serious about ocean conservation (each in his/her own way). Chasing Coral does a good job telling the very-important story about what will likely happen to the oceans (and to the planet) in the next few decades. It's also an amazing story about dedication and passion during the filmmaking journey.