The Humboldt squid is one of the most aggressive creatures in the deep ocean attacking virtually anything

If you see this in the water at night... swim the other way. The Humboldt squid is one of the most aggressive creatures in the deep ocean.
Attacking virtually anything unlucky enough to be swimming near it at night. Their beak is said to be one of the hardest organic materials in existence. If that wasn't bad enough, their tentacles are equipped with teeth to make sure they won't let go once they've latched onto something.