Step one:
First draw two arcs to create this feeling.
Second step:
Then draw another line around it for the mouth.
The third step:
Draw a large oval on the outer layer as the head.
Step 4:
Draw some triangles in the mouth and head as teeth and spines.
Step 5:
Some circles can also be drawn inside as decoration.
Step 6:
Then use a combination of arcs to draw leaves, both behind and below the head. .
Step 7:
Also use two arcs to connect the leaves to the leaves.
Step 8:
Finally, paint it with a nice color, and the piranha is finished.