Aquarium

FIG. 1 is a top, front perspective view of a first embodiment of an aquarium, according to the new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof; and,

FIG. 8 is a bottom, rear perspective view thereof.

The broken lines in all of the figures form no part of the claimed design.