The ornamental design for a spincastfishingreelbody, as shown and described.
FIG. 1 is a right front perspective view of the reel of the invention.
FIG. 2 is a front view of the reel of the invention.
FIG. 3 is a rear view of the reel of the invention.
FIG. 4 is a left side view of the reel of the invention
FIG. 5 is a right side view of the reel of the invention.
FIG. 6 is a top view of the reel of the invention.
FIG. 7 is a bottom view of the reel of the invention; and,
FIG. 8 is a left rear perspective view of the reel of the invention.
The broken lines in the Figures are for the purpose of illustrating the environment in which the design is associated and form no part of the claimed design.