The extreme intelligence of whales is displayed in this video as a sperm whale mimics a spinning diver.
Whales are smart, able to be trained to do remarkable things. They also have a level of communication not enjoyed by many creatures outside of humans. If the diver in this video wasn't aware of those things before, I guarantee that he is now.
This video shows what is certainly a once-in-a-lifetime experience for the diver. Having that close of an interaction with a whale in the wild just doesn't happen very often. Sperm whales actively hunt and kill giant squid for food, but they can also be gentle giants like the one shown here.
This sperm whale also shows off just how agile whales are in the water. It performs tight and fast spirals as the diver tries to do the same. The curiosity, playfulness, and intelligence put on display by this sperm whale is truly incredible.