Gruesome experiment pumps human and fish blood into the ocean to see which ...

YouTuber conducts gruesome experiment by pumping human and fish blood into the ocean to see which meal sharks prefer to feast on An experiment set out to see if sharks prefer human or fish blood  A YouTuber designed surfboards with a pumping system filled with blood One board had human and cow mixture and the other was filled with fish The fish board was approached more by sharks than the board with human blood

By Stacy Liberatore For Dailymail.com

Published: 22:58 BST, 11 August 2020 | Updated: 22:58 BST, 11 August 2020

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A former NASA engineer braved shark infested waters to finally uncover if these 'ruthless killers' prefer the taste of human or fish blood.

Now a YouTuber, Mark Rober setup the gruesome experiment by placing human blood and that from a fish on two modified surfboards.

The liquids were pumped into the ocean over the course of an hour while Rober and his team stood by counting  the number of visits to each board.

Using a drone, Rober and his team calculated the fish blood board was approached 134 times by the sharks, making it the winner.

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A former NASA engineer braved shark infested waters to finally uncover if these 'ruthless killers' prefer the taste of human or fish blood. Now a YouTuber, Mark Rober setup the gruesome experiment by placing human blood and that from a fish on two modified surfboards

A former NASA engineer braved shark infested waters to finally uncover if these 'ruthless killers' prefer the taste of human or fish blood. Now a YouTuber, Mark Rober setup the gruesome experiment by placing human blood and that from a fish on two modified surfboards

Rober began this journey by traveling on a private jet to Bermuda, where he met a friend who helped him whip up a five gallon smoothie of 20 dead fish. 

Although human blood was used, the team collected cow blood in order to ensure there was enough for the study - as it was both impossible and somewhat illegal to obtain five gallons.

Three surfboards were used during the experiment: one was mammal blood, another fish and the last was seawater to ensure it was not just the boards getting their attention.

Each surfboard was fitted with a pumping system that released blood slowly into the water over the course of one hour. 

The liquids were pumped into the ocean over the course of an hour while Rober and his team stood by counting the number of visits to each board

The liquids were pumped into the ocean over

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