True Facts: The Curious Adaptations of Sharks

True Facts: The Curious Adaptations of Sharks

Go to to get a 30-day free trial + the first 200 people will get 20% off their annual subscription.

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Special Thanks to:
Save Our Seas Foundation,
Dr Barbara E. Wueringer, Sharks and Rays Australia
In Australia please report your sawfish sightings to
Dr George Lauder, Harvard University,
Jonathan R. Green,
Dr David Gruber,
Dr Andrew Chin, James Cook University
Dr Dean Grubbs, Florida State University
Dr Brooke Flammang, New Jersey Institute of Technology
Marco Carè : TGI Maldives-TGI Halaveli
Anna & Ned DeLoach,
ZooWild YouTube,
Florida Scuba Divers,
Julie Higgs,
Fat Fish Movies,
Smithsonian Institute
Airflow across a wing:


Amir Akbarzadeh & Borazjani Iman
– Controlling flow separation using traveling wave actuation.

Ouro, Pablo & Stoesser, Thorsten & Ramirez, Luis. (2018). Effect of Blade Cambering on
Dynamic Stall in View of Designing Vertical Axis Turbines. Journal of Fluids Engineering.
140. 061104. 10.1115/1.4039235.

Domel AG, et al. Shark skin-inspired designs that improve aerodynamic performance. J R Soc Interface. 2018 Feb;15(139):20170828. doi: 10.1098/rsif.2017.0828.

Duchatelet, Laurent & Marion, Raphaël & Mallefet, Jérôme. (2021). A Third Luminous Shark Family: Confirmation of Luminescence Ability for Zameus squamulosus (Squaliformes; Somniosidae). Photochemistry and photobiology. 97. 10.1111/php.13393.

Du Clos KT et al. Passive bristling of mako shark scales in reversing flows. J R Soc Interface. 2018 Oct 24;15(147):20180473. doi: 10.1098/rsif.2018.0473. 

Gruber, D., Loew, E., Deheyn, D. et al. Biofluorescence in Catsharks : Fundamental Description and Relevance for Elasmobranch Visual Ecology. Sci Rep 6, 24751 (2016).

Josberger EE et al. Proton conductivity in ampullae of Lorenzini jelly. Sci Adv. 2016 May 13;2(5):e1600112. doi: 10.1126/sciadv.1600112.

Kempster RM, Hart NS, Collin SP. Survival of the stillest: predator avoidance in shark embryos. PLoS One. 2013;8(1):e52551. doi: 10.1371/journal.pone.0052551. 

Mallefet, Jérôme et al. (2021). Bioluminescence of the Largest Luminous Vertebrate, the Kitefin Shark, Dalatias licha. Frontiers in Marine Science. 8. 10.3389/fmars.2021.633582.

Park HB et al. Bright Green Biofluorescence in Sharks Derives from Bromo-Kynurenine Metabolism. iScience. 2019 Sep 27;19:1291-1336. doi: 10.1016/j.isci.2019.07.019.

Payne, N., Iosilevskii, G., Barnett, A. et al. Great hammerhead sharks swim on their side to reduce transport costs. Nat Commun 7, 12289 (2016).

Rohner CA, et al. Laser photogrammetry improves size and demographic estimates for whale sharks. PeerJ. 2015 Apr 7;3:e886. doi: 10.7717/peerj.886.

Sato, Keiichi, et al; How great white sharks nourish their embryos to a large size: evidence of lipid histotrophy in lamnoid shark reproduction. Biol Open 15 September 2016; 5 (9): 1211–1215. doi:

Sims DW, et al. Circles in the sea: annual courtship “torus” behaviour of basking sharks Cetorhinus maximus identified in the eastern North Atlantic Ocean. J Fish Biol. 2022 Nov;101(5):1160-1181. doi: 10.1111/jfb.15187. 

Tomita, Taketeru et al. (2018). Locomotion is not a privilege after birth: Ultrasound images of viviparous shark embryos swimming from one uterus to the other. Ethology. 125. 10.1111/eth.12828.

Tomita T, Murakumo K, Komoto S, Dove A, Kino M, Miyamoto K, Toda M. Armored eyes of the whale shark. PLoS One. 2020 Jun 29;15(6):e0235342. doi: 10.1371/journal.pone.0235342. 

Weigmann S, Kaschner CJ, Thiel R. A new microendemic species of the deep-water catshark genus Bythaelurus (Carcharhiniformes, Pentanchidae) from the northwestern Indian Ocean, with investigations of its feeding ecology, generic review and identification key. PLoS One. 2018 Dec 12;13(12):e0207887. doi: 10.1371/journal.pone.0207887.

Williams LH et al. Sharks as exfoliators: widespread chafing between marine organisms suggests an unexplored ecological role. Ecology. 2022 Jan;103(1):e03570. doi: 10.1002/ecy.3570.

Wueringer, Barbara al. The function of the sawfish’s saw, Current Biology, Volume 22, Issue 5, 2012, Pages R150-R151, ISSN 0960-9822,

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34 Responses

  1. Ze Frank says:

    Go to to get a 30-day free trial + the first 200 people will get 20% off their annual subscription.

    • The Milkman says:

      Great choice of thumbnail

    • Sword of S says:

      If I only subscribe for the free month and run away before they catch me for the whole year, do I get my 20% off. It would be 20% of nothing, but it’s the thought that counts. I could give that thought to someone I don’t really like, like……my in-laws! Yes, it’s the perfect gift for them. Or even better, I’ll give it to them after I use the free month. Thank you for the idea, Ze Frank. You are 20% smarter than me.

    • Zed Kay says:

      Make me

    • redmuskrat says:

      Fun fact: There is a venomous freshwater shark called a Spiny Dogfish or Spurdog shark.

  2. L. Wilson says:

    “Many sharks can swim quite quickly. This comes in handy, because sharks live in places where there are sharks.”
    This is both hilarious and profound. I love your writing.

  3. dm9910 says:

    “sharks live in places where there are sharks” is definitely one of the True Facts of all time

  4. LFTR_React says:

    “Every time you see a shark your ear whispers to your nose, ‘that could have been us'”.
    Thank you Ze Frank! I never knew why the hell they kept doing that until today!

  5. Ludoviajante says:

    I could watch this man talk about any topic for hours 😂

  6. yamahadrag69 says:

    Sometimes I wonder how much more educated I could’ve been if public education made learning even half as fun as this man does. 😂

  7. Sam Cain says:

    how is 15 minutes of Ze Frank more informative than 5 weeks of shark week

  8. scuttles says:

    As a physicist, I will never refer to turbulence as anything other than ‘mushy-mushy’ ever again.

  9. Masud Rana says:

    The level of research and effort invested in these videos is truly astounding. Additionally, he manages to transform mundane topics into an enjoyable learning experience.

  10. Denisia Rose says:

    Ze, Jerry, and the science Nerds, Thanks for taking all the facty facts stuff from shark week and breaking it down to 15mins. No annoying B-list celeb’s makes it even better!

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