Chris Kreis, aged 19, grabbed the fin of a whale shark and was pulled through the water for 20 seconds before he let it go, The Mirror reported.
Kreis was fishing in the Gulf of Mexico when the whale shark swam up alongside his boat. He then dived in and held on to the beast as his friend filmed the annoyed shark try and shake Kreis off.
Marine Biologist, Bruce Neill believed that it wasn’t a very good idea. He explained to local TV station NBC 2 that when people spend a lot of time and pressure on a fish it takes away a slime that covers the fish. They need that layer to stay healthy.
Whale sharks are said to only eat Plankton, however Neill said that because they are so large they could inflict some harm inadvertently.