From National Geographic:

The Shark Men are once again in unfamiliar territory; the Sea of Cortez. This time they have a different agenda; they are chasing Amy. Dr. Domeier believes Amy has come to the Sea of Cortez to give birth. The crew soon finds out that this phenomenal region has much more to teach them. They will go on a journey to find the truth behind the great white shark folklore surrounding this area. As the crew uncovers secrets of the Sea of Cortez; the search for Amy continues.

“Shark Men: Deadly Sea” premieres Sunday at 10pm on the National Geographic Channel.