Find a raft with a bokoblin stands (go by a submarine). Now, make sure you have arrows, magic, and the ability to use ice arrows. Fire one at the bokoblin and he will get frozen. Although the water will move, he will remain stationary, often going through the raft or floating way above. He will also sometimes shake violently up and down. If you can throw him into the water, he will float away until he unfreezes.
Submitted by: Joost Meulemeesters