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the claim
A shark's skin reduces drag in water.
the verdict
SUPPORTED
the evidence backs this
Recorded sources
4 sources for · 2 against
Is it true that a shark's skin reduces drag in water?
Yes. Peer-reviewed sources state that the riblet/denticle structure of fast-swimming shark skin reduces skin friction drag, and biomimetic shark-skin surfaces measurably reduce drag. Two general references instead attribute drag reduction to mucus on bony fishes, not shark skin.
Verdict: SUPPORTED · 4 sources for, 2 against · Last checked
Evidence for · 4
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Chehrghani, M. M., Yntema, D., Matthews, D., Rooij, M. d., & Zanjani, J. S. M. (2025). Shark skin-inspired surface designs for drag reduction in drinking water distribution pipes.. doi.org. https://doi.org/10.1016/j.watres.2025.123965
Evidence against · 2
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Wallace, R. A., King, J. L., & Sanders, G. P. (1984). Biosphere. books.google.com. http://books.google.com/books?id=r9hXAAAAYAAJ&dq=A+shark%27s+skin+reduces+drag+in+water.&hl=&as_pt=BOOKS&source=gbs_api
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More for · 3
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The Study of Drag Reduction on Ships Inspired by Simplified Shark Skin Imitation. (n.d.). cir.nii.ac.jp. https://doi.org/10.1155/2018/7854321
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Preparation, anti-biofouling and drag-reduction properties of a biomimetic shark skin surface. (n.d.). cir.nii.ac.jp. https://doi.org/10.1242/bio.016899
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Chehrghani, M. M., Zanjani, J. S. M., Yntema, D., Matthews, D., & Rooij, M. d. (2025). Hierarchical Riblet Structures for Enhanced Drag Reduction and Broader Operational Range in Water Pipelines.. doi.org. https://doi.org/10.1021/acsestwater.5c00703
More against · 1
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OpenStax Concepts of Biology: 15.6 Vertebrates. (n.d.). openstax.org. https://openstax.org/books/concepts-biology/pages/fd9299ab-cd08-4bda-bf1a-04e70c25f93e@
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