In 2007 the Russian media reported that construction workers near Chelyabinsk city’s underground river had found a “prehistoric fish.” The pictures, however, are actually misleading shots of a Triop, a type of small crustacean that has ancestors in the fossil record dating back 300 million years. So it was a living fossil, albeit a scientifically recognized one.

No, it’s not an X-rated video. Rather, it’s a mysterious, pulsating mass that a snake cam recorded in a North Carolina sewer in 2009. And while it may not be alien eggs, the gob does have an appropriate name. Indeed, a biologist identified the mass as a coiled bunch of annelid worms, called sluge worms.

In February 2016 fishermen in the Caribbean Sea were stunned when they dredged up an alien-like fish with humanoid features, including a nose, feet and webbed toes. But though the fish is weird, it is not otherworldly; it’s a shortnose batfish, which uses its fins to scuttle across the seabed.

In 2014 ABC News picked up a story of a Texan family who supposedly caught the legendary vampiric chupacabra and nicknamed the animal “Chupie.” Canid in appearance, but with versatile front paws, Chupie eventually had to be euthanized after experts identified it as a poor raccoon suffering from mange. Still, no DNA tests were ever performed…

While fishing in Penghu, Wei Cheng Jian made a strange discovery: a huge, gruesome green worm with a shuddersome pink tongue. Even after its mysterious identity was revealed (it was a sea-dwelling ribbon worm), its size makes it fascinating. Indeed, one is alleged to have reached 177 feet in length, even though normally they only grow to less than a foot long.

After her Californian UFO sighting was dismissed as a rocket test-fire, Facebook user Gianna Peponis allegedly found this dead creature and launched another conspiracy. People took to the internet with cries of “alien” and “government cover-up,” but Peponis had them all fooled. In fact, the original poster was a Missourian, and the picture was of a premature cow fetus in his backyard.

In Panama in 2009 frightened teenagers claimed an alien-looking pink creature approached them. They then obviously killed it, photographed the body, and circulated the pictures online. The internet buzzed with rumors for days, but a biopsy confirmed it to be nothing more than the corpse of a hairless sloth, bald from decomposition.

A video broadcast on Fox News in 2015 shows a creature allegedly surprising a few tourists when they visited the oldest park in the Netherlands. Loud banging also accompanies what looks like a dark hairy figure peering out from behind a tree. Some claim that the clip is a hoax, but there has been no professional evidence to prove its validity either way.

A legend since 1345, the Icelandic Lagarfljót worm, a cryptid said to live in Lake Lagarfljót, gained recent acclaim when a farmer in 2012 supposedly recorded the worm swimming in the icy lake. Although there’s no explanation as to what was filmed, a panel of experts deemed it “authentic,” and it has yet to be identified.

Is this a photo of Donald Trump’s hair finally finding freedom, or the most recent sighting of the Jersey Devil? Eyewitness Dave Black shot this from his smartphone on his way home from work in Atlantic City. Regardless of the photo’s authenticity, though, the infamous devilish cryptid has had sightings dating back to 1909…

Named for its country of origin and not it’s… haircut, the Brazilian werewolf was supposedly recorded on a security camera in 2014. Apparently, the resulting terror caused locals to enforce a 9 p.m. curfew. But while the video definitely shows something, why was the same clip also uploaded back in 2007 to no acclaim? You be the judge.

In 2016 a large shape was filmed swimming in the Thames of London on April 1, leading some to brand it an April fool’s joke. But despite whales, dolphins and even eels being known to enter the river, there has been no definitive identity for this large creature.

During the 2011 Japanese tsunami, somebody caught several sightings on video of a weird white “spirit dolphin” that seems to fly into the air from the water and then dissipate. Opinions are divided on whether it’s a mystery monster or a gas canister exploding, but so far no professional explanation has been put forward.

Google Maps can pick up some weird images, but what do you make of this one? Taken from Oke Bay, New Zealand, it appears to show a huge serpent; zooming in, however, reveals that it was probably just a misleading boat trail. Probably.

This rabbit-sized creature found in Metepec, Mexico, is said to have been caught in a rat trap and killed with acid. After several DNA tests proved inconclusive, however, taxidermist Urso Ruíz confessed that it was a hoax. It turned out that a zoo had sent Ruíz a buffy-tufted marmoset, and he made a joke out of it for the ranch he was working on. The owner thought he had seen it alive, and the story simply spiralled out from there.

In 2014 a Chinese tourist camping in the woods photographed a strange bald creature before beating a hasty retreat. But what was it that he ran from? It wasn’t Harry Potter’s Dobby or Tolkien’s Gollum, but a sci-fi actor promoting the then-new Guild Wars 2 video game.

In 2010 a deer camera set up with motion sensors allegedly took this photo of an alien-like humanoid in the woods of Berwick, Louisiana. The confused owner of the camera shared the strange photo with the media and both the production company for J.J. Abram’s Super 8 as well as Playstation, for its Resistance 3 video game, tried to claim viral marketing credit. However, it seems that a Grim could still be out there…

Facebook users began buzzing over a “skinwalker” when this bizarre picture taken near a Native American reservation in New Mexico made the rounds. Though the Native American belief in Skinwalkers, or legendary shapeshifters, is real, this picture isn’t. The image is a still from the 1980s sci-fi film Xtro.

British water company United Utilities claimed that it picked up something unusual on camera while working in a Victorian sewer. The creature was described as “far too big for a rat, standing upright on strong back legs,” and while some were fooled, the upload date gave it away: April 1, 2011.

Some thought that they had found proof of Kentucky’s legendary Goatman, which supposedly lives in a train trestle over Pope Lick Creek, when they saw this cleverly doctored photo. The trestle is real and so is the train. Indeed, in April 2016 a tourist from Ohio died trespassing on the trestle, while her boyfriend narrowly avoided serious injury.