Deep Sea Fish Rock Painting
- DifficultyHard
- Ages9–14
- 45 min
Materials Needed
- Oval or elongated rock
- Very dark navy or black acrylic paint (for deep water)
- Deep teal acrylic paint
- Bioluminescent blue or cyan acrylic paint
- Bright electric blue acrylic paint
- White acrylic paint
- Fluorescent or neon green acrylic paint (for bioluminescent markings)
- Fine detail brush
- Medium flat brush
- Glow-in-the-dark acrylic medium (optional)
- Clear gloss sealant spray
- Pencil
Step-by-Step Instructions
-
Paint the pitch-dark abyss
Wash and dry your rock. Paint the entire surface with near-black. While still wet, blend in deep navy blue in the upper areas to suggest the water column - darker at the bottom (deepest water) and slightly less dark higher up. The abyssal zone has no sunlight at all. Add a few scattered pinpoints of light for bioluminescent particles in the water column.
-
Sketch and paint the angler fish body
Sketch an anglerfish (deep sea fish) body - a wide, rounded head taking up most of the body, with a tapering tail. The anglerfish is the most recognizable deep sea creature. Paint the body in deep teal or dark gray-blue. Add a large, gaping mouth with massive jagged teeth in white - the teeth are a hallmark feature.
-
Paint the bioluminescent lure
On the top of the anglerfish's head, paint a long spine (illicium) extending forward and curving down in front of the mouth. At the tip, paint a small glowing bulb in bright cyan or neon blue-green with a white core. This is the esca - the bioluminescent lure the anglerfish uses to attract prey in the darkness.
-
Add bioluminescent body markings
Using neon green or bright cyan paint and a fine brush, add a series of glowing spots and curving line patterns along the body and fins of the anglerfish. These bioluminescent patterns suggest the photophores (light-producing organs) that many deep sea creatures use for communication and camouflage.
-
Add the glowing eye and seal
Paint a large, haunting deep-sea eye on the side of the anglerfish head - a wide greenish iris surrounding a large black pupil with a tiny white highlight. Add a glow halo around the entire fish using very diluted cyan paint. Apply gloss sealant. The wet, shiny finish makes the fish look submerged in water.
-
Add RoxGeo Code
On the bottom or back of your rock, write ROXGEO.COM followed by a slash and your rock’s unique code (e.g. ROXGEO.COM/ABC123). This lets the finder go directly to your rock’s profile page and log their discovery. If the rock is too small for the full address, write #ROX followed by the code without spaces (e.g. #ROXABC123) — it’s short, easy to search on Google, and leads straight to your rock’s journey page. Use a fine-tip permanent marker or acrylic paint pen, and seal it with clear varnish so the code stays readable through rain, sun, and adventure.
Helpful Tips
- Research anglerfish photos - the oversized teeth and glowing lure are the key features to emphasize.
- Neon or fluorescent paints for the bioluminescent markings create a striking glow effect against the black background.
- Gloss sealant is essential - it makes the dark water background look wet and deep.
- The pitch-black background is what makes the bioluminescent markings dramatic.
- Try adding glow-in-the-dark medium to the bioluminescent markings for a fun glowing effect in the dark.


