Aquarium structure

[0001]FIG. 1 is a perspective view of the aquarium structure showing my new design;

[0002]FIG. 2 is a front elevation view thereof;

[0003]FIG. 3 is a rear elevation view thereof;

[0004]FIG. 4 is a left side elevation view thereof;

[0005]FIG. 5 is a right side elevation view thereof;

[0006]FIG. 6 is a top plan view thereof;

[0007]FIG. 7 is a bottom plan view thereof;

[0008]FIG. 8 is a perspective view thereof, shown attached within an aquarium;

[0009]FIG. 9 is a front elevation view thereof, shown in the attached position;

[0010]FIG. 10 is a rear elevation view thereof, shown in the attached position;

[0011]FIG. 11 is a bottom plan view thereof, shown in the attached position.

[0012]FIG. 12 is a top plan view thereof, shown in the attached position; and

[0013]FIG. 13 is a left side elevation view thereof, shown in the attached position; and,

[0014]FIG. 14 is a right side elevation view thereof, shown in the attached position.

[0015]The broken line outline of an aquarium, and aquarium contents in FIGS. 8-14, represent environmental subject matter that forms no part of the claim. The remaining broken lines shown in the drawings represent portions of the aquarium structure that form no part of the claimed design.