The ornamental design for a marinefender, as shown and described.
FIG. 1 is a right front top perspective view of a marine fender, showing my new design;
FIG. 2 is a front elevational view thereof.
FIG. 3 is a rear elevational view thereof.
FIG. 4 is a right side elevational view thereof.
FIG. 5 is a left side elevational view thereof.
FIG. 6 is a top plan view thereof.
FIG. 7 is a bottom plan view thereof; and,
FIG. 8 is a right front perspective view of the design in an exemplary environment of use.
The dashed lines in the drawings indicate an exemplary environment of use of the design and unclaimed features, and do not form any part of the claimed design.