#3. Deep Rising (1998)

Storyline: When a band of ruthless hijackers invade the world's most luxurious cruise ship, they're shocked to discover the passengers have mysteriously vanished! But that doesn't mean they are alone! Something terrifying is lurking just out of sight: a deadly force from the unexplored depths of the ocean that begins to snatch the horrified intruders one by one!

Plot Keywords: ship captain, thief, beautiful woman, mercenary, passenger, engaging, tense ...

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#4. Piranha II: The Spawning (1981)

Storyline: A sunken US supply ship off a Caribbean island resort is the focus for a series of mysterious piranha attacks. Investigating the death of one of her son's companions after a scuba-diving trip, Anne Kimbrough breaks into the morgue with holidaymaker Tyler Sherman, only to discover that the fish have wings and can fly. But the hotel manager refuses to call off the annual fish fry on the beach, with inevitable consequences...—Michael Brooke <michael@everyman.demon.co.uk>

Plot Keywords: monster, creature, sea creature, scuba diver, scientist, boyfriend, bleak ...

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#5. Creature From the Haunted Sea (1961)

Storyline: American crook Renzo Capetto sees a chance to make a bundle when a Caribbean island has a revolution. He plans to help loyalists (and the national treasury) escape on his boat, then kill the men and blame their deaths on a mythical sea monster. Trouble ensues when the _real_ monster shows up!—Paul White <pwhite@bigfoot.com>

Plot Keywords: criminal, thief, political refugee, monster, detective, campy, madcap ...

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#7. The Rig (2010)

Storyline: As a hurricane rages outside, the small but experienced crew of an oil drilling rig settles in to ride out the storm. Isolated on the rig, their calm is short lived when a crew member goes missing and an extensive search proves futile. Slowly, they discover that a deadly creature is stalking the skeleton crew, eliminating them one by one. Surrounded by nothing but raging ocean, their communication severed and no way off the rig, the roughnecks try to survive the stormy night with an unrelenting force of death hunting them down.—Producer

Plot Keywords: monster, sea creature, sea captain, sailor, gory, brutal, suspenseful ...

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#8. Poseidon Rex (2014)

Storyline: 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?—Nick Riganas

Plot Keywords: hunter, treasure hunter, drug dealer, sea creature, monster, drug lord, bleak ...

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