Step one:
First draw two arcs and connect them to form the shape of the eels body.
Step 2:
Then draw its head with an arc and add two square fins.
Step 3:
After adding eyes to the head, draw another arc in the body.
Step 4:
Then use arcs to draw the dorsal fin and tail.
Step 5:
Then add broken lines to the dorsal fin and tail.
Step Six:
Draw the mouth and add dynamic short arcs around the body.
Step 7:
Finally, apply a nice color and the eel is ready.