1. Draw the outline of the fish body first, and then draw a curve on the outline as the fish head.

2. Then, draw the fish's eyes and mouth on the fish's head. The fish's mouth is very big, so the line should be lengthened.

3. Draw the dorsal fin and ventral fin of the fish, and draw a few lines on the fin as the lines on the fin.

4. Finally, draw the tail on the small fish.