Nima swam out of the diving bell as it landed on the seabed.
The Tylosaurus however, noticed Jess and began pursuing her.
The Tylosaurus attempted to snatch her in its jaws, but could not get through the gaps in the pipeline.
The Tylosaurus then slammed through the supports of the pipeline and clamped down on another support beam.
The creature almost bit down on Jess who managed to swim away.
Nima regrouped with Gerry and Jess at a set of rocks, out of sight of the Tylosaurus.
The trio swam alongside a set of rocks as the Tylosaurus searched them.
They managed to stay out of sight of the animal, quickly swimming under its tail, undetected.
The group hid behind a large coral reef, when suddenly the Tylosaurus burst through the coral.
The group saw a gate that was an exit from the lagoon to the cave system.
Gerry, Jess, and Nima quickly fled towards the gate.
As the survivors passed through the gate, Gerry shot a compressed tank, causing the gate to slam shut in front of the Tylosaurus, trapping it in the lagoon.
Gerry was much relieved he was able to prevent the animal from escaping into open water.