Spiny dogfish sharks are top predators. But for some reason, they kept dying at an aquarium. To find out what was killing them, the aquarium recorded a shark swimming through the waters, and caught this incredible interaction between the huge fish and a giant Pacific octopus.
Want to see another incredible octopus in action? Check out senior editor Julie Leibach's post with a video of a Indonesia's veined octopus building a house out of coconut shells.