Forced to pay off his debt to the murderous Caribbean crime lord, Tariq, instead, the American scuba-diver and treasure hunter, Jackson Slate, wakes up from its deep hibernation a massive, T-Rex-like sauroid off the coast of Belize. Now, Slate has to team up with diver, Henry, happy holidaymakers, Rod and Jane, and the marine biologist, Sarah Jones, to retrieve a Mayan treasure from the dangerous waters; however, the scaly beast from the sea is ever-present and famished. But, what good is a chest full of gold when you're dead? Can Jackson and his team defeat the all-powerful reptile, Poseidon Rex?
An ancient evil awakens
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Did You Know?
Throughout the movie the English subtitles show Slate's nickname as "Jacks", however the end credits show "Jax". See more
At the 46 minute mark, P Rex is shown walking on water, the water had already been shown to be deep enough for P Rex to have to swim up to the surface to reach the boats. See more