The ornamental design for a fishlinewormthreader, as shown and describe.
FIG. 1 is a top perspective view of my new design for a fish line worm threader.
FIG. 2 is a front elevation view thereof;
FIG. 3 is a back elevation view thereof;
FIG. 4 is a left side elevation view thereof;
FIG. 5 is a right side elevation view thereof;
FIG. 6 is an enlarged top plan view thereof;
FIG. 7 is an enlarged bottom plan view thereof;
FIG. 8 is an exploded, top perspective view thereof; and,
FIG. 9 is a top perspective view in use thereof.
The broken lines depicting a fishing line in FIG. 1, and a fishing line, worm and a hook in FIG. 9 illustrate environment that forms no part of the claimed design.