The characteristics of the sailfish are :
1. Are known as fastest sea animals,
2. Maximum speeds of more than 100km/h.
3. Sagong \emph{et al.} (2008, Phys. Fluids) investigated the role of V- shaped protrusions existing on the sailfish skin in the skin-friction reduction but those protrusions did not make a direct role in reducing drag.
4. The long bill has been regarded as a device of reducing drag by separation delay through turbulence generation.
5. The hydrodynamic characteristics of sailfish and swordfish by installing the stuffed ones in a wind tunnel and measuring the drag on their bodies and boundary-layer velocities above the body surfaces.
6. The drag coefficients of sailfish are 0.0075
Resources : Abstract: EV.00007 : Hydrodynamic characteristics of sailfish and swordfish
http://meetings.aps.org/Meeting/DFD09/Event/111207
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