The ornamental design for an inflatableoverwaterfloatingbed, as shown and described.
FIG. 1 is a perspective view of an inflatable overwater floating bed showing my new design;
FIG. 2 is a front view thereof;
FIG. 3 is a back view thereof;
FIG. 4 is a left view thereof, the right view being a mirror image thereto;
FIG. 5 is a top view thereof;
FIG. 6 is a bottom view thereof; and,
FIG. 7 is a partially enlarged view of FIG. 4.
The broken lines shown on the drawings depict portions of the inflatable overwater floating bed that form no part of the claimed design; The broken lines in FIGS. 4 and 7 depict the boundaries of the enlargements that form no part of the claimed design.