Testing if Sharks Can Smell a Drop of Blood

Mark Rober

83 ਮਿਲੀਅਨ ਦ੍ਰਿਸ਼29 099

    Scientific proof Pixar sits on a throne of lies. Thanks to Bose for their support and for the dopest headphones I've ever worn: bose.life/markrober
    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: www.dropbox.com/s/iqn14ydzqafhws5/SharkBait_Manual_PartsList.pdf?dl=0
    Sean's Hodgin's channel who did most of the heavy lifting for making the boxes: paprom.info/cloud/E-bw6PRKuDlH6fP1mP4nOw
    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 PAprom channel.
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    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

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    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.

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    1. Johnny Bravisimo

      Great video! Thank you for making this! But here is a bigger challenge, if you will. Try this experiment on great white sharks. And compare the results from the different types of sharks from this video. let me know if you are willing to try this.

    2. Juan Rivera

      No wonder sea levels are rising

    3. Dre Hamilton

      11:55 🥺 he was swirling

    4. Juan Rivera

      This experiment sucks

    5. Juan Rivera

      Are you the only child?

    6. Juan Rivera

      Sharks are not attracted to xenomorph blood

    7. Juan Rivera

      He must of been the smartest in marine biology

    8. Juan Rivera

      Beer urine

    9. Juan Rivera

      Beet urine

    10. Juan Rivera

      Urine same as salt waters

    11. Juan Rivera

      Why cow blood yeah like cows hang around the ocean

    12. My Name

      oh so this is were my blood donation goes WHat A GReAt CAuSe

    13. D Tarmizi

      sharks are truly amazing...

    14. Glimmer Twins Rock It

      Mark Rober-Mars Rover

    15. Megan’s Loomtique

      Omh I just released mark is a merdure because how did he get the bloodd

    16. Dhatri Sathe

      It is sad that sharks dont hurt people and they just want to live and eat and idk what sharks do but it is very sad that people kill sharks more than sharks kill people and mostly why sharks kill people is manly cause they disturbed them and try to hurt and even kill them which is really sad this is also losing humanity 😔😦😦😰

    17. จักริน คงแก้ว


    18. Venice

      Who's here in 2021?

    19. Leago Bokaba

      This dude is literally asking for a Death wish

    20. Fabiana Lino


    21. Christian DeMutis

      Dog man Joe dog man joe

    22. D Corley

      Unlike the bug the camera gave off electronic vibrations. Tri electricity and blood and just electricity

    23. Torrance T

      “Hey mom can we go to the aquarium?” “We have an aquarium at home” The aquarium at home:

    24. Grace Kaliyeva

      i jus wanna know where and how he got the blood..

    25. kart kid


    26. Alicia Martinez

      The painful dedication startlingly cheat because shield rahilly concern lest a regular market. descriptive, sharp quince

    27. Stopjosh47

      82 million views and only 1.5 mil likes???

    28. Isaiah Black

      If I was going into cold or even warm water I would draw blood

    29. Domenique May

      I LOVE your videos!!

    30. Domenique May

      OMG these sharks are so gawjus...


      Türk yoku la

    32. Liam Johnston

      dUdE tHeReS sHaRkS!

    33. Sherlock

      11:49 *when i try that, i just feel like i aquaman*

    34. External Internal

      I like that he says when he says how much blood you that leaves your body at the end he says then you die

    35. External Internal

      Don’t sharks attack if threatened

    36. Pastel Viibes

      I love swimming but like I hate swimming in like lakes and oceans because I get like scared from a fish I know but like I’m terrified by sharks

    37. Nick Brellas

      before he did this video. he take a covid 19 test

    38. Mano Billi 333

      So finally I'm watching this video firstly I saw a meme abt this some days ago nd now I'm watching this in actual btw water is just so clean .♥️

    39. Brennan Layfield


    40. Brennan Layfield


    41. Champion 234

      Genius man

    42. Pale Pictures Media

      why is the title and description in German ?

    43. Brawler- Einhorn


    44. It BR

      Why the sharks don't attack them?

    45. Uyo Asibow

      You ID

    46. Oikawa simp

      What kind of sharks is this 🤔? Some sharks are friendly even tho they still eat meat

    47. The Official Green Kane

      Should of tested the blood experiment by building a L shaped metal arm like lever that would drop down into the water, then back up, then down etc. while the bloods dripping to create splashes & movement in the water. Blood + movement = sharks?

    48. AlyaRoblox

      Никто: Абсолютно никто: Акула на аве видел:КИБОРГ УБИЙЦА

    49. Luc and Sarah CR

      Why drop sea water in sea water ??

    50. buster trash

      That one chill shark at the end lol

    51. Carey A

      Plot twist: the sharks had just devoured some tourists and were full

    52. Holly Qiu

      the mother and baby shark pair is soooooo cute. cant handle this cuteness.

    53. Hilary Hills

      Also take note that because the sharks had already been " tricked" by the cow blood perhaps they knew it'd be the same situation again. Animals are smart creatures

    54. Cupycake


    55. Jenni Rodriguez

      I saw that vid on shark weak.

    56. Kristen Swanepoel


    57. Azhad Azmirudin

      Mark: A DROP of BLOOD Also the beginning of the vid:

    58. Lisamarie

      Meet matters....🤔☝🖤🎁

    59. José Argueta

      Alternative title: How to Die

    60. patrick li

      So thats why women live longer than men

    61. be positive

      One day , that shark will smell and next day you 'll wake up hand less😂😂

    62. Pedro Palma

      Luke tipple the host of opposite worlds?

    63. Sandra Medina Benini

      It’s lies shak no attack

      1. that one annoying girl

        ok karen. listen. it didnt say that. it said TESTING blood.

    64. Dan Thompson

      The psychotic tachometer geographically consider because sign cephalometrically bolt against a ambitious sushi. vague, bumpy motorcycle


      that was soooo cool mark you are a genie I love your experiment and I don't like sharks but it was cool continue like that

    66. Nathan Dong

      Notice how mark says noob lol

    67. Timmeh offical

      Theres no way he did that he would be already dead.

    68. nghtblccd

      Please don't touch a shark at its nose unless you want it to go away, because their noses are really sensitive

    69. Millenna Pereira

      se postou ta vivo

    70. Raven Aussie

      Okay, PAprom, I'll watch it.

    71. KH3N_ Playz01

      Omgg there so nice :0

    72. Jasson Hamblin

      The moment when you se you own blod


      i have A phobia on pointy things mostly the injection/sucking blood thing soooooo if im at the experiment i probably wont volunteer at the human blood experiment

    74. El Pocho

      Actual quality content with effort put in, dope ✔️

    75. Ara Kay

      Question: what does the shark skin feel like? Rubbery, sandy, slimy, leathery, etc.?

      1. sven erik Moeller

        Sand papery, their skin is made from dermal denticles which are like tiny teeth, and leathery

    76. yudy vanessa jaramillo berrio

      omg so i have hematophobia and i made it through the whole video, was pretty interesting.

    77. Gwennie Morris

      love this video!

    78. michael D

      surely all blood doesn't smell the same. Surely sharks are more attracted to the blood of a species they prefer to eat than that of a species they prefer not to eat. Plus they have that whole 6th sense thing with their electrosensory organs, making it pretty likely that they can tell a surfboard from a fish. lol

    79. Guenther Steiner

      Girl: Isn't it weird girls live longer than boys? Girl 2: Yes, weird Boys:

      1. Awesome Highlights


    80. bestie

      The shark dosent even look at the blood and instead goes strait for his neck

    81. Topher D

      I understand the experiment but I say we don’t need an experiment when we have the USS Indianapolis incident to tell us exactly what can happen with sharks. A majority of the survivors were attacked, eaten, or drowned. The sharks even played mind games with the soldiers. I take those soldiers word for it.

    82. Nigel

      Has Anybody Seen my friend Gavin?

    83. Ashley Shmikler

      What if u put mannikins on them so the sharks think real people r there

    84. Altan Zengin


    85. Lexi Organ

      Lets take a min to appreciate how brave he is to do this Xxx😘😘

    86. Rezena

      What kind of sharks were those? I can’t believe he was swimming with them so casually and even touched one. Am I missing something here?! Lol 😆

    87. Aero Rocketdog

      An America Online shirt in 2019?

    88. Red X

      they can smell blood

    89. Matt Syljuberget

      As a scientist, I would like to say how much I appreciate the effort you took making this video. Awesome!

    90. Heitor Rainho

      I think those are some Sand Sharks, they're pretty inofensive, i've been wondering if it was some white sharks , tiger sharks or hammerhead sharks that could be different?

    91. Havva Dolaman

      Türk olan ben miyim sayımızı gösterelim 👇

    92. Don-E

      well i got alot out of this video my biggest fear is the ocean 🙃 thx for knocking the fear down a notch 😅 nothing but love mark

    93. sanaya khatrii

      Hatts of cameraman

    94. Harseerat Kaur

      Girls- Why we live longer Boys -

    95. Nashley HM


    96. AIM R1cks0n

      get motion sickness?

    97. Mole Rat YT


    98. s p


    99. Sugeng Hariyanto

      Kate mos fan kis low the skistux

    100. tahseen banu

      Ohk.....!!!! so u are out there to pollute the clear water!!