Step #1
First commence the tutorial by making an oval & curve line.
Step #2
Draw outline for head.
Step #3
Make eye & retina.
Step #4
Make fins of the killifish.
Step #5
Draw tail of the fish.
Step #6
Make dotted skin texture shape as shown.
Step #7
Draw net like shape as shown over the fins and tail.
Step #8
Finally, make necessary improvements to finish.