Here's the third of seven scale tutorials! Requested by @tyrocks31, I will explain here:

1. Start with your body outline and underbelly. Then from the back, draw a curve.

2. Draw an angle from the bottom of the curved scale, this makes a gill.

3. Draw a curve from the angle's left side that continues straight through the underbelly.

4. Repeat with #2 first

5. Slightly darken the angle's scales to make them gills and add the glow spots on the underbelly.

Also note the body picture up in the right corner, which says, "end about here and continue with just spots"

There you go! I hope this helped, others coming soon!
I used a 0.7 mechanical pencil