Testing if Sharks Can Smell a Drop of Blood

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Scientific proof Pixar sits on a throne of lies. Thanks to Bose for their support and for the dopest headphones I’ve ever worn:

Also, thanks to Discovery for putting my life in danger.
#SharkWeek begins July 28 only on Discovery
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Links for the build instructions:

Sean’s Hodgin’s channel who did most of the heavy lifting for making the boxes:

Pump animation made by the talented Jared Owens:

Connor was the beast feeding the sharks underwater. He has some amazing footage for licensing and his own YouTube channel.
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email: sharkmanconnor@gmail.com
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Follow my marine biologist friend Luke Tipple on Instagram-

More info that was promised-
What is likely happening is that the sharks can smell the blood but it’s just not in a quantity that is interesting to them especially since they don’t love human blood that much (btw, I spoke with a marine biologist and mammal blood is all the same from a chemical marker stand point so cow blood is a suitable substitute for human blood). If I did the experiment again, I would want to test human blood vs. fish blood.

This is the most definitive study done to date in a control lab environment on what is least and most interesting to them: The Biology of Sharks and Rays Peter A. Klimley and Steven Oerding; ISBN-13: 9780226442495. Particularly pages 134-140. Figure 6.7; Table 6.2

***Music***

00:11 – Arrow – Andrew Applepie
01:14 – Kalimba Jam – Blue Wednesday
2:30 – Dizzy – Political Statement and JMoney –
3:59 – Cereal Killa – Blue Wednesday
5:17 – Marimba Idea – Blue Wednesday
6:12 – Berlin – Andrew Applepie –
6:40 – Dansez – Fasion
10:45 – Dive – Lvly
12:34 – New Shoes – Blue Wednesday
13:02 – Q – Blue Wednesday
15:12 – Too Happy to be cool by Notebreak

Summary: I’ve always wanted to test if sharks can really smell a single drop of blood in the water from 1 mile away. So I went to the Bahamas in shark infested waters and set up an experiment to get to the bottom of things.

MERCH-
They are soft-

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39 COMMENTS

  13. Mark, could you help explain a possibly significant confounding variable? I’m wondering why the sharks all congregated around the boat. Were they just curious, and if so, why were they not so generally curious about the surfboards? OR, were the sharks brought to the boat for the experiment by feeding them? If the sharks have been conditioned to staying close to this or other food-providing boats, they would be reluctant to leave the boat for whatever smell and it would skew the results

  20. Sharks do not like people..they only bite out of curiosity. we taste wrong, try the cows blood again with the faster flow.

  21. Hey Mark I doubt you’ll see this but you know what I’m gonna say it anyway after you did the second experiment maybe they just got tired well not tired but they got smart and knew that the boards dont do anything so They didn’t even check them out I know this is probably very unlikely but maybe it is what’s happening

  30. One of the experiments I'd also have liked to see was if the sharks responded to blood coming off a moving target, not just stationary objects. Because, I'm not particularly sure if smell is the only factor based on which sharks find prey.

  31. Does anyone else noticed it except me at 4:37 the sound of motor is just like the timelapse music he plays in his videos. Like if you noticed it as well after or before reading this.

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