"Explore scary things that surfaced from the sea. From mysterious sea creatures ... See to Believe uncovers the forgotten, mind-blowing facts that will leave viewers questioning everything.

In every ocean around the globe. How long they've been around: 450 million years. How big they are: Smaller than a human hand to the size of a school bus. Long portrayed in pop culture as scary ...

Scary, squishy, cool ... but they also live in different habitats; some like the ocean surface, others the depths, and a few prefer freshwater. What unites them is that they’ve converged ...