1
First step
First draw a bracket shape in the middle of the picture, add an elliptical tank mouth at the top, and add an arc edge at the bottom. After the picture is completed, add some aquatic plants on the left and right sides of the fish tank
2
The second step
Add an arc-shaped bottom between the two groups of water plants on the left and right to make it more three-dimensional, and draw a small fish above it. Finally, after completing some details, you can color it