From National Geographic:

This time the Shark Men aren’t searching for sharks they’re tracking the giant Humboldt squid. Little is known about the elusive monster that can grow as long as a school bus. Joined by three squid experts, the Shark Men scour the Sea of Cortez by spotter plane and boat in the hopes of finding a giant squid. After days of finding only a juvenile Humboldt, Captain Brett manages to catch a fully mature Humboldt, but what the cameras catch is even more spectacular.

National Geographic Channel’s “Shark Men” airs Saturday at 10pm ET/PT.