Use light pencil strokes to begin. You will need to do some erasing in the next step.;
, Erase everything above the line.
 Make sure this line is parallel to the top of the fish bowl. This line is your waterline. If you plan on having a colored fish bowl, sketch this very lightly.
 Using a ruler, lightly draw an even line about 1⁄4 centimeter (0.1 in) from the bottom most part of the bowl. Take your ruler and measure where the fish bowl itself and your new line are exactly 1 centimeter (0.4 in) apart. Draw a light line here, and repeat on the other side. Curve the sides of the bottom up a little, so it looks more circular.
 Add plants, gravel, fish castles, or whatever you please.
,
Draw a simple circle, being as careful as you can.
Use a ruler and draw a line approximately half an inch, or 1 centimeter (0.4 in), across the top of the fish bowl.
Sketch a line about half an inch (1 cm) below the first line.
Add the bottom of the fish bowl.
Draw the interior of the fish bowl.
Color in your new masterpiece!

,
Finished.
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