The ornamental design for a fishnethairprotector, as shown and described.
FIG. 1 is front perspective view of the invention.
FIG. 2 is a front elevation view of the invention.
FIG. 3 is back elevation view of the invention.
FIG. 4 is a first side elevation view of the invention.
FIG. 5 is a second side elevation view of the invention.
FIG. 6 is a top plan view of the invention.
FIG. 7 is a bottom plan view of the invention; and,
FIG. 8 is a front perspective view of the invention in use.
The broken lines showing a partial human figure in the drawings illustrate the environment in which the design is used, and assists in showing how the claimed design appears when worn. The broken-line subject matter in the drawings forms no part of the claimed design.