Step 15: Darken the long line under the body (on the right side) for the first part of the fish's pelvic fin. Add a wavy line on top to make the shape thicker and flowy. The bottom end should be thin and pointy. Add a couple of short, curved lines at the top for the base. Draw the visible part of the royal gramma's other pelvic fin the same way.
Step 16: Darken the arc on the bottom using a wavier line for the royal gramma's last fin. Add a few short lines along the top and bottom of the shape for the ridges on the fin.
Step 17: Use the big shape on the right as a guide to draw the tail. Darken the main shape but make the right edge wavier for a more organic feel. Draw a few lines along the left and right side of the shape for the ridges on the fish's tail. Pay attention to the orientation of the lines. Use the remaining lines and shapes as guide to draw the rest of the body. Simply darken the outer edges of the initial guides to create the shape of the fairy basslet's body. Make the lines a bit wavier.
Step 18: Go over the final sketch lines with a pen, marker or any other type of permanent ink. Take your time and be careful when you ink to avoid any accidents. After inking, get rid of every pencil mark with an eraser for a cleaner drawing.
Final Step: Color your royal gramma drawing! Use black for the pupil and yellow to draw a streak across the eye and below it. Use different shades of purple and blue on top of each other for the front part of the head. Use shades of pink and red farther back along the fish's body. The pectoral fin is basically see-through, so color directly over it. Use dark blue and black to draw and color a circle on the dorsal fin for this fish's distinctive spot.
Add the colors lightly at first and slowly blend them and build up to the shade that you like. At about halfway along the body, add some yellow dots as the body transitions to all yellow on the lower half. Leave some sections on the fins blank, as they are see-through. Surround the yellow dots with pink.
Add some yellow-orange to the edges of the bottom half of the royal gramma's body to give the shape more dimension and volume. Just like with the front part of the body, color lightly at first and slowly build up to the shade of yellow that you like. Be careful to not overlap the yellow transition scales as you color around them using pinks and purples. Coloring can be time-consuming, so be patient and take breaks.
Use a bit of dark blue and black along the outer edges of the front of the fish's body to make the shape rounder. It's a good idea to use reference as you draw and color for a more accurate depiction of a royal gramma fish. If you have a pet royal gramma/fairy basslet or a similar type of fish, try to duplicate their colors on your drawing. A similar fish is a royal dottyback, and it may be easier to color, as it's just pink and yellow without the dots in the middle. Don't forget to pause the video after each step to draw at your own pace.