In 1868, rumors spread of a sea monster which attacks ships in the Pacific Ocean and disrupt shipping lanes. Professor Aronnax and his assistant, Conseil, board a U.S.…
Solana Beach, a seaside tourist resort, has come under attack by a giant octopus, which captures and devours human swimmers and boaters, picking the skeletons clean of…
Having previously survived being riddled with bullets, the Gill-man is captured and sent to the Ocean Harbor Oceanarium in Florida, where he is studied by animal…
The legendary empire of the lost continent of Mu reappears to threaten the world with domination. While countries unite to resist, an isolated World War II Captain has…
A five man submarine plants sensors around the worlds oceans to monitor for a impending earthquake.
Searching for the lost world of Atlantis, Prof. Aitken, his son Charles and Greg Collinson are betrayed by the crew of their expedition\'s ship, attracted by the…
Strange goings on at the site of an experimental underwater laboratory as a mysterious object of unknown origin is detected in the area. A group of researchers…
On a Bermuda beach, a sleeping Magnus Dens is approached by a beautiful but mysterious woman, Jennie Haniver, who seems to recognize him. In the meantime, Magnus is…
Two teenagers come upon an apparently abandoned military installation at night. They take advantage of what appears to be a swimming pool to skinny dip. The teenagers…
A geology expedition in the Amazon uncovers fossilized evidence (a skeletal hand with webbed fingers) from the Devonian period that provides a direct link between land…
In the Florida Everglades, a pair of larger-than-human, intelligent leeches live in an underwater cave. They begin dragging locals down to their cave, where they slowly…
After a scientist is mysteriously killed while assisting a top-secret bioengineering project in the swamps of the American South, government worker Alice Cable arrives…
A nuclear submarine on maneuvers in the Pacific Ocean, captained by Commander Pete Mathews (Kenneth Tobey), comes into contact with a massive sonar return. The commander…
The film opens with a sequence of meteor showers, with a narrator describing that meteorologists and scientists are studying the phenomenon. With the meteor shower…
Mr. Tako, head of Pacific Pharmaceuticals, is frustrated with the television shows his company is sponsoring and wants something to boost his ratings. When a doctor…
During a rainy night, a fishing boat is attacked by a giant octopus. The giant octopus is then attacked by a giant green-haired humanoid monster. After defeating the…
When the Japanese freighter Eiko-maru is destroyed near Odo Island, another ship—the Bingo-maru—is sent to investigate, only to meet the same fate with few survivors. A…
In the Salton Sea, an underwater earthquake causes a crevice to open, releasing prehistoric giant mollusks. A rescue training parachute jump is conducted, but the patrol…
Professor Millard Wyman (John Carradine) sends a crew of two men, Paul Whitmore (Allen Windsor) and Craig Randall (Robert Clarke), and two women Lauri Talbott (Sheila…
Around the turn of the century, American mining engineer Ben Harris is working on the Cornish coast in England when he finds a body washed up on the beach. Ben makes…
Three men - Dr. Ken Tashiro, Dr. Jules Masson, and journalist Perry Lawton - are trapped in a bathysphere due to seismic activity. They are rescued by the crew of the…
In a hijacked sea base thousands of feet below the ocean's surface, freelance terrorist, Lars Rynark threatens to release a dangerous biotoxin that will destroy the…
A giant alligator runs riot in a small town with a lake connected to a sewer/drainage system. Typical plot; nobody believes the sightings until lots of people have been…
A man brings a woman named Syrene (Leigh Christian) to an island, and she pays him with some pearls. The inhabitants of the island appear to be inbred, with oversized…