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I personally got in the water and tested if Sharks had a preference of human blood vs. fish blood.
Point of clarification: A few people have pointed out the dates on the negative and positive Covid tests are the same. You'll also notice my doctor was Bob Newby from Stranger Things. Turns out there is a lot of personal info on a Covid result test and the part that says negative and positive wasn't easily readable so I photoshopped up something that solved both of those issues and didn't bother changing the date. No conspiracy here. I promise I actually got Covid and would have much preferred to actually filmed on the original schedule and not had to deal with it even with the private jet silver lining.
Here is a link to that tiny exercise machine I was using the the jet. Luke (my shark expert buddy) invented it and it's really clever. He's launching a Kickstarter really soon-

Music info coming soon
Here is a talented up and coming artist named Kenyi. Check him out!
Here is some of the music I used from independent artists:
0:01 - Cereal Killa - Blue Wednesday
0:57 - Toys - Ponder -
2:05 - The Ocean - Andrew Applepie -
2:21 - New Shoes - Blue Wednesday
6:06 - Kalimba Jam - Blue Wednesday
8:44 - Arrow (Instrumental) - Andrew Applepie
17:31 - Too Happy to be cool by Notebreak -

This is a specialized human-shaped shark cage. I designed - and this is me in the middle of a shark feeding frenzy in that cage, which is that happens, doesn't actually keep the sharks out they're in the freaking cage, but to understand how i ended up in the middle of the bahamas, with buckets of blood Surrounded by a butt ton of sharks, we've got ta go back exactly one year because that's when i ran a test to see what really happens if sharks smell a drop of human blood in the water. For that experiment, i pumped out 15 drops of human blood per minute for an hour, pretty close to a bunch of sharks that, in the end, just weren't really that interested. So this busted the myth from the movies that sharks are these ruthless killers that just go crazy if they smell a drop of your blood from a mile away.

But those results made me really curious. If the sharks would react differently to fish blood versus human blood and if they did go crazy for fish blood, could i use that to put myself right at the center of a shark feeding frenzy and so to satiate? My curiosity, my friends at discovery, helped me make my way back to the bahamas as part of shark week this year, but this time i wouldn't be alone what up robes oh wow, mark's, jumping in on this? What's up y'all look last shark week shark tried to kill me. I think we'll have a little bit of science with robert a little bit of fun with dude, perfect and a little bit of me all right. You all ready to do this.

We were born ready, sir all right chop chop. Let's get to it fellas we will not let you down looking forward to it, see ya. Yeah i've got this idea for a bill to just really get me in close with the sharks uh last i that was me saying, i'm finished with the call bro. No, of course, yeah all right see you guys later, let's get to it.

Let's do it. Looking forward to it, and so in the direction of shaq diesel, it was time to head to the bahamas. All that was left was to swab my nose to prove to the bahamian government that i didn't have coronavirus. The only problem was my test came back positive and this just made me really sad, because not only was i going to miss out on this epic adventure, but as far as i was concerned, i was basically just waiting to die and i had to interact with My family, through the glass door to the backyard using a laser pointer and not even fat gus, would get within six feet of me.

Now, i'm happy to say i eventually beat the rona and tested negative, but the only problem now is. I missed my chance because they were no longer accepting any commercial flights from america because we're number one baby. So i was once again incredibly sad until i found a loophole because while you couldn't go to the bahamas on a public commercial flight, there were no rules against going to the bahamas on a private jet, and since this was the first and last time i would Ever have my own personal g6. I acted like i've been here before, like the true professional, i am, i mean mostly put elon on hold and transfer to oprah, and i should mention flying across country on your own plane, isn't the most ecologically responsible choice.

So while i was in the air i utilized this website called, you might have heard of it to plant enough trees to suck up the carbon, not only from my flight, but the next 100 flights this plane would take in the end. It's important, you guys know, i'm still super grounded and i didn't let the experience change me one bit, and so now that i was in the bahamas. The first thing i did was check it with my marine biologist shark, diving expert, buddy luke tipple, because we need to figure out how to somehow get blood out of a fish. The first thought is like: can you just freaking blend a fish, give it a shot? I'll be over here, dude you've clearly, never seen.

Will it blend, there's a whole youtube channel dedicated to this okay. I think if we add a little bit of water yeah - oh yeah, oh yeah, this looks like the number 32 from jamba juice. We tried a variety of other techniques and eventually started hitting our stride and the buckets started filling up. If i could smell this, that looks pretty delicious.

The good thing about mark is it's his stupid idea, but he's not making other people do it. I respect that about me too yeah. I also learned this is what fish skills look like on the inside they're, like pages in a book to increase the surface area which maximizes the oxygen they can pull out of the water. So we've taken about 20 fish with a little bit of help from the blender turn them into this farm.

A shark i'm like that's freaking, delicious. Now that we had five gallons of mouth-watering fish blood smoothie. It was time to get some answers. We already know that sharks, don't necessarily go nuts in the presence of a little bit of human blood, but would they go nuts in the presence of a little bit of fish blood and as a firm believer in the scientific method? It was time to test our hypothesis by heading out to sea, once we were far enough from land luke, and i came up with the game plan for the experiment.

Basically, we would have two surfboards in the water. One would have a five gallon bucket of our fish blood smoothie and then another would have five gallons of human blood. We would also have a third board that just had sea water as a control to make sure the sharks weren't just interested in the surfboards. Then we would pump out the contents of each of the buckets over the course of an hour and observe how many sharks approached each board and once we know which one they prefer after this we'll use that tomorrow, in the cage just to create the most wild Feeding frenzy right, which sounds super fun to me, because you're not in the cage and so with the plan in place, all that was left to do was put the boards together and get them out with the sharks.

One of the limitations to last year's test was that the boards might have been too close to the boat, so it's possible some of the sharks actually smelled the blood but didn't investigate it because they were just waiting for a handout from the boat. So this time we basically placed the boards in the middle of the freaking ocean super far away from the boat, so it wouldn't be a confounding variable. Oh, and i should also mention we ended up using cow's blood because it's really hard to legally find five gallons of human blood. And after talking with a couple shark scientists they've shown experimentally that all mammal blood essentially smells the same to sharks.

So it wouldn't affect the results to use cow blood in place of human blood. So now that all three boards were in place, we double checked to ensure each was anchored down to the ocean floor. Then i just had to start all three custom built pumps using our custom built remote trigger, which is the exact moment. I realized it must have got busted while being shipped out here, because it wasn't sending a signal which sucks, because there's absolutely no way to run the pumps manually.

Luckily, a trick i learned while working at nasa is you always build redundancy into your systems just in case, so we have it in the code that if no remote start signal is received after an hour, each of the pumps will just automatically start up on their Own, it's just a feature. We never had time to test, so we just had to firmly cross our fingers and hope for the best. I'm hopeful we've had to overcome a lot to get here for this video. What's one more little challenge and at exactly one hour right on cue, the backup code kicked in and saved our whole experiment with blood.

Now, officially, in the water we put the drone into the air and started our observations, and things were pretty quiet for about the first 20 minutes. But then we had our first hit on the mammal blood board shark yeah shark face oh yeah yeah, but pretty soon thereafter things started heating up for the fish blood smoothie board. Oh, my gosh there's one two: three: four: five: six: seven: eight nine 10 11 sharks around the fish, smoothie board and then 10 minutes later things were only more intense here. You can see the difference in activity between the three boards and, while you're running an experiment and still collecting data.

You really need to keep an open mind, but given what we were seeing, it was getting pretty difficult to remain objective, and so, after an hour, we called the experiment and went inside to officially tally up the results using the drone footage and it turns out the Mammal blood board was approached eight times. The seawater control board was at zero, and the fish blood board had a whopping 134 approaches from a shark. It definitely seems like this fish smoothie is where it's at right. It's pretty obvious massive blob of sharks, no sharks.

I think that's the go for tomorrow for maximum feeding frenzy. Now that we had a game plan for my feeding frenzy cage the next day we headed back to shore and to our hotel to get some rest for what was to come. Oh and fun side note: if the only way to get to a vacation destination is by private jet, it really cuts down on the crowds. We literally had this whole resort to ourselves.

Well, almost to ourselves, there were like 40 cats who apparently must also fly private. We woke up bright and early the next morning, feeling refreshed and headed right back out to sea, where luke and i prepared some massive bags of fish blood smoothie for me to burst open once i went down it just seemed like a cool idea to make a Cage to get in the middle of the fruiting frenzy until this moment now that they're making me put on freaking chain mail makes me reconsider my life choices. If something terrible happens, shaq you got ta take care of my family, because this is all your fault and after several months of prep, unfortunately, it was time for me to get in it. Also, just so happens.

I might have forgot to mention this part to my wife, i'm not looking under the water, yet on purpose she might have been under the impression i was just doing another experiment with surfboards and pumps. Sorry sweetie, not only was i wearing 10 pounds of steel chainmail for protection, but my vest is also filled with 20 pounds of lead weights. That means i sank pretty fast, but also that the buoyancy to weight ratios were perfect for giving me practice for walking on the moon. That's one small step because, like many of you, i will definitely go to space in my lifetime.

Again. Just haven't mentioned that to the wife, yet all right, you ready for the tip. Okay. The face is coming behind you right now.

Now that i have the fish smoothie bags and everyone was back at a safe distance. I just had to pop these stupid things. Okay, here we go. Oh, this is crazy.

What are you doing? Okay, there we go. Oh my god. Oh the sharks were literally trying to eat me through the bottom of the cage. So they left me no choice but to defend my honor yeah get out of my cage get out of my case.

I'm gon na kill you, sir. We knew all along that the most dangerous part would be when i exited the cage, because they'd still be agitated and they'd be stoked to finally have access to the soft chewie center. So the plan was for one of the other divers to distract them way off. To the side with the bait box, and then i would get out as silently as possible, so they wouldn't notice me oh crap, that was loud holy crap.

I've got to close this back up luke. I need help man holy crap going away for me. For this experience is that sharks have been on this planet longer than the dinosaurs or even trees have so they've had 400 million years of evolution to develop these instincts that are rewarded for smelling fish blood humans and cows would be an extremely rare delicacy, so it Makes sense that it's not just hardwired into their brains and so with all my limbs intact and with my curiosity, fully satiated, i will leave you with these profound words that, in my defense might have been the drama means speaking as humans. We're always the predator and not really ever the prey, but this gave me a sense of what it's like to be a tuna fish.


18 thoughts on “Shark attack test- human blood vs. fish blood”
  1. Avataaar/Circle Created with python_avatars Joy Rimon says:

    Are we gonna ask where he got the human blood?
    Or are we just gonna assume that from the people in his basement?
    Edit: nevermind, i watched the rest of the video.

  2. Avataaar/Circle Created with python_avatars Marc Alwyn Zafranco says:

    Me:*leaves for a water*
    Me:*comes back*
    Mark:*blending a fish*

  3. Avataaar/Circle Created with python_avatars Vinod Gilbert says:

    me: Oh cool!

  4. Avataaar/Circle Created with python_avatars Albin Salguero says:

    So you can travel in a private plane but not in commercial plane 😆 😂

  5. Avataaar/Circle Created with python_avatars Leah Eldridge says:

    You know I’m crazy with cats because I like cats

  6. Avataaar/Circle Created with python_avatars Sophia Brennan says:

    He is friends with mr beast and dude perfect!!!!!!!!????

  7. Avataaar/Circle Created with python_avatars Bryan Garcia says:

    The vulgar booklet seasonally trace because backbone feraly shelter about a classy ostrich. empty, nauseating paperback

  8. Avataaar/Circle Created with python_avatars harvestheverest says:

    Bruh is anyone else getting random replies from 18+ bots account? from comments months or even years ago. Idk much about viruses or malwares like do I need to be concerned??

  9. Avataaar/Circle Created with python_avatars Kiahna Brain says:

    Imagine if the vegan teacher saw this lol she’s try get you cancelled but get cancelled herself

  10. Avataaar/Circle Created with python_avatars MrSocks says:

    why do bots target me does this happen to anyone else

  11. Avataaar/Circle Created with python_avatars josiah fisher says:

    Every time I see a video about this I think about delicious
    shark fin soup 🍲 😋

  12. Avataaar/Circle Created with python_avatars Yeet Potato’s says:

    So are you going to tell your wife about this

  13. Avataaar/Circle Created with python_avatars •Kawaii_Girl• says:

    Uhmmmm sir….. Where did you get your u-uhm human blood…?
    Also imagine if the sharks knock over the cage open the top and uhm ya you know what would happen next.

  14. Avataaar/Circle Created with python_avatars bee the axolotl •ᴗ• says:

    did i really look at blended fish


  15. Avataaar/Circle Created with python_avatars Alice Stanley says:

    When the shark bumped against the top of the cage my hand went tingaly

  16. Avataaar/Circle Created with python_avatars やぶやぶ says:

    "Luanching a kickstarter" I see your typo bro.

  17. Avataaar/Circle Created with python_avatars Samuel Mejía says:

    Excellent video, although the results cause me doubts because when grinding the fish, in addition to using their blood, you included all their meat and that may have been what attracted them.

  18. Avataaar/Circle Created with python_avatars Mark Rober says:

    Sorry this took awhile. I've got 8 absolute banger videos I'm currently working on through April 2021 but it turns out the Rona slows things down a bit. They will be worth the wait! For updates, follow me on social stuff @MarkRober.

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