Best movies like Mega Piranha

An oceanic observation station is in desperate trouble after a sudden shark attack wrecked the oxygen supply. The accompanying ship, a coast guard cruiser, and other ships in and around the Bermuda triangle are attacked as well. The US Navy sends a submarine to investigate, but soon they too are under attack.

Trapped on a remote island by a hurricane, a group discover a doctor has been experimenting on creating half sized humans. Unfortunately, his experiments have also created giant shrews, who when they have run out of small animals to eat, turn on the humans.

A genetically created Anaconda, cut in half, regenerates itself into two new aggressive giant snakes, due to the Blood Orchid.

Scientists Culp and Wallach suspect that there is someone other than their research primates inhabiting their polar station.

When flesh-eating piranhas are accidently released into a summer resort's rivers, the guests become their next meal.

A scuba diving instructor, her biochemist boyfriend, and her police chief ex-husband try to link a series of bizarre deaths to a mutant strain of piranha fish whose lair is a sunken freighter ship off a Caribbean island resort.

A black hole hits North Wisconsin and opens a door to other dimensions. Giant 15 meter spiders emerge from it, who have an appetite for human flesh! Dr. Jenny Langer and Dr. Vance from NASA try to save the world.

When shark conservationist Dr. Misty Calhoun is invited to consult on a top-secret project run by pharmaceutical billionaire Carl Durant, she is shocked to learn that the company is using unpredictable and highly aggressive bull sharks as its test subjects, which soon break loose and cause havoc.

An experimental submarine with a very experienced crew, the "Siren II" is sent to find out what happened to the "Siren I" after it mysteriously disappeared in a submarine rift. Things go awry when they begin to find things that shouldn't be there...

When the body of a man is found completely destroyed in the swamps in Louisiana, the medical investigator Sam Rivers is assigned to investigate the murder. He travels with the biologist Mary Callahan to the location where the victim lived in a floating house and he meets his family and friends. They find that Chinese snake-heads genetically engineered that belong to a wealthy hunter are attacking and killing the locals. While the group fights to survive, the hunter Jeff arrives with his team to hunt the predators.

Little coastal town is being terrorized by deadly Barracudas.

A fanatical animal rights activist releases giant pythons into the Everglades, believing the wild animals should be set free. When they start decimating the native animal population, an over-zealous park ranger feeds experimental steroids to wild alligators so they can fight back. The giant pythons and gargantuan alligators go on a killing spree, and it is now left up to the two feuding women to put aside their differences to put a stop to the creatures and the destruction.

The California coast is terrorized by two enormous prehistoric sea creatures as they battle each other for supremacy of the sea.

Doctor Baines has been conducting genetic experiments on piranhas and has made them virtually unstoppable. Unfortunately, his assistants, Maggie and Paul, accidentally release the hybrids into the Lost River Lake threatening to destroy everyone in their path. Can they prevent the flesh-eating piranhas from escaping into the ocean and spawning?

A freak hurricane hits Los Angeles, causing man-eating sharks to be scooped up in tornadoes and flooding the city with shark-infested seawater. Surfer and bar-owner Fin sets out with his friends Baz and Nova to rescue his estranged wife April and teenage daughter Claudia.

A freak weather system turns its deadly fury on New York City, unleashing a Sharknado on the population and its most cherished, iconic sites - and only Fin and April can save the Big Apple.

On a future earth where 98% of the surface is underwater, a Warlord who controls an army of sharks meets his match when he captures the daughter of a mysterious shark caller who must learn to marshal a supernatural ability if she is to free her people from the Warlord's dominion.

Using breakthrough flesh-regeneration technology, a biotech firm creates a set of living dinosaurs. But when the creatures escape their museum exhibit and terrorize Los Angeles, a former firefighter must rescue his teenage daughter from the chaos brought on by the Age of Dinosaurs

Jewel thieves attempt to recover treasure from piranha infested waters. Mistrust and betrayals happen amongst the gang in the quest for gold.

Six high school seniors celebrating with day's excursion find themselves on rowboat attacked by man-eating fish and must decide who must be sacrificed as they fight their way back to shore.

Wildlife photographer Terry and her brother Art go to Venezuela for a photo shoot. They hire Jim Pendrake to guide them through the jungle. However, the trio run afoul of evil local hunter Caribe.

A team of scientists go to a nuclear mining facility to investigate a possible meltdown and instead find a large amount of cloned dinosaurs.

An offshore drilling accident triggers the release of a giant prehistoric shark. When marine biologist Kat Carmichael arrives, she runs up against corporate front man Roger Wade, who plots with Stewart to disrupt her investigation. With the help of Skipper Chuck and disc jockey Dynamite Stevens, Kat tries to find a way to defeat the monster which has evolved to a state where it can walk on dry land and fly...it's the SUPER SHARK!

When a team of backpackers sets out to explore the Indian jungles, one of them is bitten by a poisonous spider and killed.

When an oil company unwittingly unleashes a prehistoric shark from its icy prison, the Jurassic killer maroons a group of art thieves and a group of college students on an abandoned island

A hybrid creature - half piranha and half anaconda -- attacks a low-budget horror movie crew on location near her nest when her egg is stolen. Now they must outrun and kill the deadly piranhaconda as well as stop the mad scientist who stole the egg - before they all become dinner.

An American scientist up to no good (as usual) by creating the half-pterodactyl, half-barracuda: Pteracuda. When the creature inevitably escapes, it's up to Sharktopus to stop him.

A baby dinoshark evolves into a ferocious predatory adult, terrorising tourists and locals offshore from Puerto Vallarta, Mexico.

Four friends set out by boat for an idyllic vacation on a private, remote island. But unknown to them, a weaponized shark has escaped from a top secret military lab nearby, a shark that was genetically engineered with hate in its blood, and programmed to hunt any human within range. Now, these friends must band together to battle an all new brand of predator who will stop at nothing to remain at the top of the food chain.

On a lush tropical island, working under a secret government charter, Martin Drake has not only grown sprawling acres of giant vegetables, but inadvertently spawned two mammoth reptiles as well. Now they've broken free of their enclosures, and Drake has only one option: kill the creatures before word gets back to Washington and they close him down. When Drake's first team of well-armed mercenaries gets wiped out within hours of setting down in the jungle, he turns to one lone hunter, The Cajun, to go in single-handedly. But will The Cajun be cunning enough to find the creatures and destroy them before they turn the blue waters red with the blood of tourists. The only hope is to bring the monsters together and make them fight. When one emerges victorious, that will be the time to strike and kill the other. It's a risky plan, but ultimately the only one that may work. One of David Carradine's last movies.

A fisherman and his family fight to take down a greedy real estate developer who has released toxins into the ocean, turning the area's sharks into bloodthirsty hunters.

The Megalodon shark. A prehistoric killing machine 60 feet long, flashing 200 pounds of teeth and weighing over 20 tons. It's the deadliest predator the world has ever seen. The scientists say it's been extinct for more than 10,000 years. The scientists are wrong. In the darkness of the deep, an underwater research station has been viciously destroyed. Now a tough team of daring divers led by Spencer Northcutt [Antonio Sabato Jr. "Melrose Place"] is taking an experimental sub to war. It's killer instinct vs. sophisticated technology, deadly jaws vs. harpoon-tipped torpedoes, mega-shark vs. modern man is a thrilling extreme deep sea fight to the death.

A scientist enlists the help of the US army to investigate the mysterious disappearance of her father, deep in the Belizean jungle. Caught in the crossfire between a brutal guerrilla army controlled by a mystical warlord, they are also confronted by an even bigger terror giant mutated wasps that are, for some reason, thirsty for blood.

A horrifying hybrid of genetic science and nature has taken over the Louisiana bayou, leaving terror in its wake! In the heat of the summer, what began as an day of boating and bikinis changes drastically when a school of genetically enhanced snakehead fish finds their way into Black Briar Swamp.

A Semester at Sea ship is attacked and sunk by a mutated two-headed shark, and the survivors seek refuge on a deserted atoll. The coeds, however, are no longer safe when the atoll starts flooding.