Sunfish Drawing: Disc Body and Fin Layout

Object Drawing Lessons

This lesson teaches a reliable construction for a sunfish drawing: a disc-shaped body, a small mouth at the front, and fins placed at the top, bottom, and rear. The method uses a baseline and midline to set proportions, then adds fins in a fixed order so the layout stays consistent. Letter styles and hand proportions vary, so the rubric rewards a clear disc body and correct fin arrangement rather than a single perfect outline. All measurements are hypothetical examples; measure your own paper and tools before drawing.

Practice materials: Printable downloads are not available for this lesson yet. Use the instructions and four exercises below.

Setting the disc body and midline

Start with a light horizontal baseline across the lower third of the page. Mark a horizontal midline across the middle of the body area; this is the reference line above which the mouth and eye are measured, and the caudal fin is centered on it. Also mark a vertical center line to divide the body left and right. The sunfish body is a flattened disc, so its height and width should be close; a ratio between 1:1 and 1:1.2 is acceptable. Draw a circle or soft oval that touches the baseline at the bottom and rises to a rounded top.

Keep the outline light so you can adjust it. The mouth sits at the front edge, slightly above the midline. A small wedge or short curve is enough; avoid a large jaw. The eye is a small circle placed just behind and above the mouth. As a hypothetical example, on a 6 cm wide body, place the eye center about 0.6 cm behind the mouth (one-tenth of the body width) and slightly above it; measure your own body width and use the same one-tenth rule.

1. Draw a horizontal baseline and a horizontal midline above it, plus a vertical center line.
2. Sketch a disc body whose height is close to its width, touching the baseline.
3. Mark the front edge and place a small mouth slightly above the horizontal midline.
4. Add a small eye behind the mouth, about one-tenth of the body width from the front.

Placing dorsal, anal, and caudal fins

The dorsal fin runs along the top rear of the disc, starting about halfway back and ending near the tail. The anal fin mirrors it along the bottom rear. Both fins should be short and rounded, not long streamers. The caudal fin sits at the rear edge, centered on the horizontal midline, and is usually a rounded fan or a soft triangle.

Use the horizontal midline to check symmetry: the dorsal and anal fins should be roughly equal in size and set opposite each other. The caudal fin should not extend far beyond the body outline. A common error is placing the dorsal fin too far forward; keep its front edge behind the body's widest point.

1. Draw the dorsal fin from the top rear, starting behind the widest point.
2. Draw the anal fin on the bottom rear, opposite the dorsal fin.
3. Add the caudal fin at the rear edge, centered on the horizontal midline.
4. Check that dorsal and anal fins are similar in size and position.

Refining the outline and checking layout

Once the fins are placed, darken the body outline and fin edges. Keep the mouth small and the eye simple. The pectoral fin is a small rounded shape just behind the eye, low on the side; it should not dominate the drawing. Erase construction lines lightly, but keep the baseline and horizontal midline visible until the layout is confirmed.

Check the drawing against the convention: disc body, small mouth, dorsal fin on top rear, anal fin on bottom rear, caudal fin at the rear center. Valid alternatives include a slightly taller or wider disc, a rounded or triangular caudal fin, and small variations in fin size, as long as the arrangement is clear.

1. Darken the body and fin outlines.
2. Add a small pectoral fin behind the eye, low on the side.
3. Erase construction lines after confirming the layout.
4. Compare the fin positions to the convention and adjust if needed.

Worked example

A student draws a disc body 8 cm wide and 8 cm tall on a baseline. The horizontal midline is at 4 cm above the baseline. The dorsal fin starts at 5 cm from the left and ends at 7 cm. The anal fin starts at 5 cm and ends at 7 cm on the bottom. The caudal fin is centered at 8 cm. Is the layout consistent with the convention?

Four practice exercises

Common mistakes

• Drawing an elongated oval body instead of a disc. Measure height and width; keep them close, between 1:1 and 1:1.2.
• Placing the dorsal fin too far forward. Start the dorsal fin behind the body's widest point, near the top rear.
• Making the mouth too large. Use a small wedge or short curve at the front edge, slightly above the midline.
• Forgetting the anal fin or placing it off-center. Mirror the dorsal fin along the bottom rear, using the horizontal midline as a guide.

Self-check rubric

• Body is a disc or near-disc with height and width ratio between 1:1 and 1:1.2.
• Mouth is small and placed at the front edge, slightly above the horizontal midline.
• Dorsal fin is on the top rear, starting behind the widest point.
• Anal fin is on the bottom rear, roughly opposite the dorsal fin.
• Caudal fin is at the rear edge, centered on the horizontal midline.
• Pectoral fin is small and placed behind the eye, low on the side.
• Construction lines are light and do not obscure the final outline.
• Valid alternatives in fin shape and slight proportion changes are accepted if the layout is clear.

Questions and answers