The ornamental design for an octopus shower caddy, as shown and described.
FIG. 1 is a front perspective view of an octopus shower caddy of the invention;
FIG. 2 is a front perspective view of an octopus shower caddy, with a detachable suction cup shown as separated from the caddy;
FIG. 3 is a rear perspective view of an octopus shower caddy, with a detachable suction cup shown as separated from the caddy;
FIG. 4 is a front view thereof;
FIG. 5 is a rear view thereof;
FIG. 6 is a top view thereof;
FIG. 7 is a bottom view thereof;
FIG. 8 is a right side view thereof;
FIG. 9 is a left side view thereof; and,
FIG. 10 is an additional perspective view thereof, with the broken-line disclosure of a toothbrush being for illustrative purposes only and forming no part of the claimed design.