Step #1
First commence the tutorial by making three ovals & a curve line.
Step #2
Draw outline for tail & fins. Also draw a straight line in the middle of the body.
Step #3
Make head, mouth & eye.
Step #4
Draw outline for body.
Step #5
Make five fins across the body of the perch fish.
Step #6
Make gill shape as shown & tail.
Step #7
Make retinas & lines over the tail, fins and gill as shown.
Step #8
Finally, make necessary improvements to finish.