The giant turtle was seen off the coast of Alaska and sank the ship that Nick and Audrey were having a romantic cruise on. It attacked again when it found them on a nearby deserted island, but they were saved by Komodithrax. Later, the giant turtle returned and attacked Godzilla and Komodithrax's nest while the military launched a missile strike on the island. During the battle, both the giant turtle and Komodithrax fell into a fissure that opened in the ground and disappeared.
The giant turtle may be a nod to Gamera or Kamoebas, simply due to the fact it is a giant turtle kaiju.