Surfboard fin

FIG. 1 is a perspective view of the surfboard fin in accordance with the new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof;

FIG. 8 is another perspective view thereof; and,

FIG. 9 is a reference view illustrating a usage example of the surfboard fin which is coupled with a main surfboard. The broken lines shown in the drawings from no part of the claimed design.