Nigel has been knocked off the boat by the shark and swims back, he managed to land a hit with the shark-camera. In a few days, they find the camera floating in the sea, and when they load it into the on-board television, they watch the Megalodon in question attack a whale the same size as it.
When the crew of the Ancient Mariner head backwards in time, Nigel says that as the Ice Age begins, the whales that Megalodon preyed on migrated to colder waters, where Megalodon could not follow. Megalodon is doomed to extinction.
Megalodon
Odobenocetops
Unidentified whale
Thalassocnus (in book)
[edit] The Second Most Dangerous Sea
Name: The Jurassic
Time: 155 million years ago
Location: England
Special Equipment Used: Smell suit, water scooter, undersea radar
Filming Location: The Bahamas
Set around England, which was then largely underwater. This is the second most dangerous sea. Hazards include Liopleurodon, the largest carnivorous animal of all time. Nigel spies a school of migrating Leedsichthys. One weaker one is lagging behind the school, and a Metriorhynchus and a Hybodus shark launch a joint attack. Using radar, Nigel discovers that a huge Liopleurodon is heading toward the dying individual.
Nigel equips his and the cameraman's diving suit with a chemical system that will spray a cloud of deterrent at the huge pliosaur should they get too close. The crew use huge waterproof lights when they descend to the corpse of the Leedsichthys, because it is night. A pair of Liopleurodon are feasting on the carcass, and Nigel starts to move closer toward them. When one turns its head towards him, Nigel panicks and ejects the chemical, which works on the huge predator. [2]
Liopleurodon
Metriorhynchus
Leedsichthys
Hybodus
Ophthalmosaurus (in book)
Cryptoclidus (in book)
Eustreptospondylus (in book)
[edit] The Most Dangerous Sea of All Time
Name: The Cretaceous
Time: 75 million years ago
Location: Kansas
Special Equipment Used: ROV, radar
Filming Location: New Zealand
After viewing a colony of Hesperornis on the coastline, Nigel and another member of the Mariner pause for a second to view a huge underwater bloodbath. As far as Nigel (using a periscope) can figure out, a Hesperornis was killed, and the resulting carnage has attracted many sea animals, such as Squalicorax,Xiphactinus and Halisaurus. Nigel explains that this sea is far to dangerous to go diving in; huge carnivores like Xiphactinus and Tylosaurus are far too dangerous. Instead, the crew of the Ancient Mariner have rigged an ROV to dive for them, while they watch from the safety of the boat. Sending it down, the crew finds a small pod of Elasmosaurus riding their wake like 21st century dolphins.
In the morning, Nigel discovers that they have hit a dead Archelon, which was mauled by some other predator before being hit by the boat. Having done the same thing with present-day leatherback turtles, Nigel forgoes his personal safety to track down an Archelon and ride it. He and the cameraman ride off in the small inflatable raft that they had used previously in the Ordovician.
Before long, Nigel finds his quarry, and dives, grabbing onto the huge turtle's shell before noticing the imminent danger: a school of Xiphactinus are circling the Archelon. Nigel quickly makes his escape back up to the raft, but disaster strikes. A family pod of Tylosaurus attack the raft, completely overturning it, plunging the crew into the sea. Fortunately for Nigel, the Tylosaurus seem more interested in the boat than the humans, and they quickly escape back to the Mariner.
During the credits, the radar onboard picks up a colossal mob of Tylosaurus moving in from all sides, preparing to attack the ship...
Tylosaurus (identified as a giant mosasaur, revealed in encyclopedia)
Hesperornis
Halisaurus (identified as a mosasaur, revealed in book, encyclopedia and on website)
Elasmosaurus
Archelon
Xiphactinus
Pteranodon (appears to have been domesticated by the crew; is seen on the boat several times and is fed a dead fish by an unnamed crew member)
Tyrannosaurus (not identified)
Squalicorax (identified as shark, revealed in book)
Hadrosaurus (in book)
Dromaeosaurus (in book)
Ankylosaurus (in book)
Globidens (in book)
Dolichorhynchops (in book)
Hainosaurus (in book)
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