Mega Piranha (also known as Megapiranha) is a 2010 science fiction disaster film produced by The Asylum. It was directed by and stars , and . In the tradition of The Asylum's catalog, this film is a mockbuster of Piranha 3-D.

It is the time of the Spanish Inquisition. Maria does not like what is going on during the "Auto De Fe". When she speaks out, she is arrested and accused of being a witch. Torquemada has plans for her! He orders her tortured, and her tongue to be cut out. Her husband attempts to free her...

In the 1400's, Rumpelstiltskin is imprisoned inside a small jade figurine. In modern-day Los Angeles, the recently widowed wife of a police officer, with baby in tow, finds her way into a witch's shop and purchases a certain figurine, resulting in the cackling beast being freed and demanding possession of the baby.

It was a normal night in Las Vegas, Nevada, all the lights were flashing brightly, until a man with one hand, one eye, and one leg walks into a pawn shop with a statue of a hideous looking Leprechaun. The owner claims it's a good luck charm. The statue also wore a medallion around it's neck. The careless pawn shop owner took off the medallion setting the Leprechaun free, along with his pot of gold that everyone wants and like before, he'll kill anyone who goes near it. Driving into town that night was a young man named Scott who was off to L.A. to go to school. Along the way he meets a sarcastic, but friendly, girl named Tammy. Scott tries gambling but loses everything, so he goes to the pawn shop to pawn his Rolex watch. At the shop, he finds the dead owner and one of Leprechaun's gold coins that grants a wish to its finder. Scott wishes for a winning streak, but what he does not know is that the casino is run by a crooked man who hates to lose...

Dr. Lorenz, a mad scientist, wants to keep his elderly wife young. He does this by kidnapping young females and extracting fluid from them. He then injects this fluid into his wife. What a diabolical guy!

The boys are sent to a mountain camp. Stranded in a small rural town, they hear about a "monster killer" roaming the countryside. At night, they sneak out. Peewee is shot by a grave-digger, and they are forced to seek aid at an old mansion. The owner of the mansion (Lugosi), insists that the boys spend the night. After seeing PeeWee walk around the house in a trance, the boys decide that the man turned him into a zombie. They gang up on him and tie him up. The nurse at the boys camp (Dorothy Short) sets out to find the missing boys with Von Grosch (Dennis Moore), who has come to rid the town of the killer- or has he?

A young man finds out that his parents had been used in an atomic-weapons experiment shortly before he was born, and that the results have had some unexpected effects on him.

Mismatched travellers are stranded overnight at a lonely rural railway station. They soon learn of local superstition about a phantom train which is said to travel these parts at dead of night, carrying ghosts from a long-ago train wreck in the area. The travelers eventually get to the bottom of the things that go bump in the night. In between the scary bits, comedian Arthur Askey plays the gags with his Vaudeville style humor, to the constant irritation of his fellow passengers.

A series of strange deaths takes place in London. All are accidents but the victims are single men with no family and they all have a link to a life insurance company run by the mysterious Dr. Orloff.

Dr. Carruthers feels bitter at being betrayed by his employers, Heath and Morton, when they became rich as a result of a product he devised. He gains revenge by electrically enlarging bats and sending them out to kill his employers' family members by instilling in the bats a hatred for a particular perfume he has discovered, which he gets his victims to apply before going outdoors. Johnny Layton, a reporter, finally figures out Carruthers is the killer and, after putting the perfume on himself, douses it on Carruthers in the hopes it will get him to give himself away. One of the two is attacked as the giant bat makes one of its screaming, swooping power dives.

A young man arrives at his father's mansion in Louisiana to discover that a secretive cult is using winged creatures to raise the dead to do their bidding.

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 killed.

Monty is a bodybuilder. His gym is the very heart of his existence. He is aggressively male, outrageously narcissistic and a bigot. Sharing this strange world is Monty's cerebral and emotionally wounded younger brother, Bertin. One stormy day, the brothers' bizarre but settled lives are suddenly disrupted by the unexpected arrival of Lilith, a Catholic nun collecting contributions for an unusual cause. Lilith's arrival is the catalyst required to generate a momentous change in Bertin's relationship with his brother: a change that results in the astonishing and gruesome downfall of the vainglorious Monty.

A group of people on a world wide search for oddities find themselves trapped in a nine hundred year old Italian castle when they accident unleash the Demonic Toys.

Visionary scientist Janos Rukh convinces a group of scientists and supporters to mount an expedition to the African continent to locate and study an ancient meteorite of great significance. He exposes himself to the highly toxic radiation of the meteorite, and while an antidote devised by Dr. Benet saves him from death by radiation poisoning, his naked touch causes instant death to others. Back in London, the benefits of the meteorite's controlled radiation offer Dr. Benet an opportunity to restore eyesight to the blind. The antidote's toxicity excites Prof. Rukh into paranoid rages as he seeks revenge against the members of his expedition, who he accuses of stealing his discovery for their own glory.

In 19th Century Paris, the maniacal Dr. Mirakle abducts young women and injects them with ape blood in an attempt to prove ape-human kinship. He constantly meets failure as the abducted women die. Medical student Pierre Dupin discovers what Mirakle is doing too late to prevent the abduction of his girlfriend Camille. Now he desperately tries to enlist the help of the police to get her back.

Dr. Ben Cahill, a fine city doctor, gets so stressed by marital problems and alcohol that he freezes up under pressure in the emergency room. To get his act back together, he decides to unwind a few months in the house he and his ex bought on Orr island, an insignificant (former) fishermen place off the coast of Maine. He almost immediately becomes the butt of spite from a gang of local nobodies. After the doctor started examining, at the request of the reasonable sheriff Hobbs who leans to his side, some animal and human corpses with strange internal as well as external injuries, one of the brutes, not so handy handyman Jack Wald, has a fatal nocturnal accident crashing into Dr. Cahill's car. The doc observes one of the red cockroaches which recently infest the island has pincers, most unusual, reads up and contacts the university entomology department, where this African species isn't too well-known either...

Friends and family pursue an estranged writer to an isolated house only to find that, once they've entered, their own fears will kill them if they leave.