Tail creates double jets: shark
Tail of a shark creates double jets by actively changing the tail's rigidity in mid swing.
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"As the tail crosses the midline, the radialis muscles within the tail are actively stiffening the tail against this increased hydrodynamic loading. And it is precisely at this time of maximum expected stiffness and greatest drag that the first vortex is produced (figure 3), resulting in a jet with strong lift and thrust components (table 2). The remaining vorticity is shed as the tail is cupped slightly and continues laterally until it changes direction at maximum lateral excursion" (Flammang et al. 2011: 3674)
Squalus acanthias (non Linnaeus, 1758)
IUCN Red List Status: Vulnerable
Habitat(s): Marine Neritic, Marine Oceanic
Some organism data provided by: FishBase
Organism/taxonomy data provided by:
Species 2000 & ITIS Catalogue of Life: 2008 Annual Checklist
Application Ideas: Underwater transportation. Medicinal administration through blood stream. Medical robotics for micro cameras and micro surgical tools.
Industrial Sector(s) interested in this strategy: Transportation, Medical
Brooke E. Flammang