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  • Strategy

Shell alters buoyancy: green turtle


Hawaii turtle 2 / Mila Zinkova / LicenseGFDL - Gnu Free Document License

The shell of some sea turtles allows for different levels of buoyancy for juveniles and adults by changing shape.

"Sea turtles sometimes swim on the surface; Jeanette Wyneken tells me that the flared, V-shaped bottom is characteristic of buoyant baby sea turtles, which are obligatory surface swimmers. With maturity and the shift to submerged swimming, the hull shape changes to one more characteristic of submarines." (Vogel 2003:116)
About the inspiring organism
Med_hawaii_turtle_2 Green Turtle
Chelonia mydas LINNAEUS 1758
Common name: Suppenschildkrote

Habitat(s): Marine Coastal/Supratidal, Marine Intertidal, Marine Neritic, Marine Oceanic
Learn more at
Some organism data provided by: TIGR Reptile Database
Organism/taxonomy data provided by:
Species 2000 & ITIS Catalogue of Life: 2008 Annual Checklist

Threat Categories LONG_EN IUCN Red List Status: Endangered

Bioinspired products and application ideas

Application Ideas: Identifying design features for safe and efficient passenger ferry systems. Shape for underwater transport devices.

Industrial Sector(s) interested in this strategy: Transportation, boats, submarines

Department of Biological Sciences
Jeanette Wyneken
Florida Atlantic University
Vogel S. 2003. Comparative Biomechanics: Life's Physical World. Princeton: Princeton University Press. 580 p.
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