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© MMV James Bryant, this site is dedicated to Keven Bryant (1964-1975) who knew the pleasures of fishing but was not given the time.

                                                                                                       

Vortices are a little bit more difficult to explain but once you see them on the surface at Trow all will be revealed.

When a large fish such as a carp swims, its tail (Caudal fin) produces the thrust to push it through the water.

This may cause water to spin (vortex) in a circular motion and you can see evidence of this rising to the surface (left pic).

If you see these on the surface at Trow then you'll know that a large carp is swimming nearby as small fish cannot produce visible vortices.

Vortices occur when a body moves through a medium such as water or air and the next pic shows an example of this in clouds high above the Earth.