The thing about any mystery is that, once people get involved in trying to solve it, you’ll get all kinds of competing theories. The Loch Ness Monster is no different. While some people readily accept that there must be some cryptozoological anomaly living in the waters of the loch, other people aren’t so sure.
Jeremy Wade, the host of the show River Monsters, suggested the monster was actually a Greenland shark. The Greenland shark can grow to 18 feet in length and has extremely small pectoral fins, giving it an overall serpentine appearance. It’s also known to eat anything that gets close to it.
Steve Feltham, Guinness record holder for maintaining the longest continuous monster hunting vigil of the loch, has been looking for Nessie for 24 years. After all that time, Feltham has made a determination about the nature of the monster — he thinks it’s a catfish, according to The Scotsman. Specifically a Wels catfish, able to grow up to 13 feet in length, introduced to the lake during the Victorian era for sport fishing.
One of the most bizarre theories about Nessie was that it was actually an elephant. National Geographic reported that paleontologist Neil Clark came up with the theory after seeing Indian elephants going for a swim. Traveling circuses used the road alongside the loch for travel, perhaps letting the elephants stop to swim. Who knew Nessie was potentially so diverse?