Introduction

Underwater images can feel magical, peaceful, mysterious, and full of colour. With Gemini, you can create coral reefs, tropical fish, sea turtles, dolphins, whales, mermaids, sunken ships, underwater cities, scuba divers, and dreamy ocean wallpapers.

The 45 prompts below are ready to copy and paste. You can customise them by changing the marine life, location, colours, lighting, and image format.

How to Use Underwater Prompts

Open Gemini’s image-generation feature and paste a prompt into the chat box. You can also upload a permitted image and ask Gemini to replace the background with an underwater scene or add marine elements.

A useful prompt structure is:

Create a [type of underwater image] featuring [subject] [action] in [underwater setting]. Add [marine life, objects, and colours]. Use [lighting], [water clarity], [camera angle], and [aspect ratio].

For example:

Create a photorealistic underwater photograph of a sea turtle swimming above a colourful coral reef. Add tropical fish, sunrays filtering through clear turquoise water, gentle bubbles, realistic marine textures, and a wide 16:9 composition.

For editing an uploaded image, use an instruction such as:

Replace the background of the uploaded image with a clear underwater coral reef scene. Keep the main subject’s shape, pose, colours, and proportions unchanged. Add realistic water light, marine life, and gentle bubbles.

Avoid depicting unsafe diving practices, harmful interactions with marine animals, or polluted environments unless the image is intended for conservation education.

Also read: Gemini Prompts for Image Generation

45 Gemini Prompts for Underwater Image Generation

Coral Reef and Marine Life Prompts

1. Colourful coral reef

Create a photorealistic underwater photograph of a vibrant coral reef filled with tropical fish, sea anemones, and soft corals. Add clear turquoise water, sunrays filtering from above, gentle bubbles, realistic marine textures, and a wide 16:9 composition.

Created with Gemini AI

2. Sea turtle over reef

Generate a realistic underwater image of a sea turtle swimming gracefully above a colourful coral reef. Add small tropical fish, sunlight rays, clear blue water, detailed shell texture, gentle bubbles, and a cinematic wide-angle composition.

3. Clownfish and anemone

Create a detailed underwater close-up of a bright orange clownfish swimming near a sea anemone. Add soft coral colours, clear water, gentle light rays, realistic marine textures, shallow depth of field, and a square 1:1 composition.

4. School of tropical fish

Generate a vibrant underwater photograph of a large school of blue and yellow tropical fish swimming over a coral reef. Add sunlight beams, clear turquoise water, realistic fish movement, soft shadows, and a wide 16:9 composition.

5. Manta ray gliding

Create a cinematic underwater image of a graceful manta ray gliding through deep blue ocean water. Add sunrays from the surface, small fish, gentle bubbles, realistic wing texture, and a wide-angle composition.

6. Jellyfish in deep water

Generate a dreamy underwater image of translucent jellyfish floating in deep blue water. Add soft glowing light, delicate tentacles, gentle bubbles, realistic translucency, and a peaceful vertical 9:16 composition.

7. Seahorse close-up

Create a detailed underwater macro photograph of a yellow seahorse holding onto a piece of coral. Add tiny bubbles, soft green and blue background, realistic textures, shallow depth of field, and a square 1:1 composition.

8. Octopus on the seabed

Generate a realistic underwater image of a curious octopus resting on a sandy seabed beside colourful coral. Add detailed tentacle texture, natural lighting, small fish, clear blue water, and a wide-angle composition.

9. Dolphin underwater

Create a joyful underwater photograph of a dolphin swimming through clear blue ocean water. Add sunrays from above, gentle bubbles, realistic skin texture, a peaceful expression, and a wide cinematic composition.

10. Coral reef at night

Generate a mysterious underwater image of a coral reef at night illuminated by a diver’s soft torchlight. Add nocturnal fish, glowing coral details, deep blue water, realistic textures, and a vertical 9:16 composition.

Created with Gemini AI

Ocean Animals and Open Water Prompts

11. Whale shark

Create a majestic underwater photograph of a whale shark swimming calmly through clear blue ocean water. Add small fish, sunlight rays, realistic spotted skin, gentle bubbles, and a wide cinematic composition.

12. Humpback whale

Generate a breathtaking underwater image of a humpback whale swimming gracefully in deep blue water. Add sunrays filtering from the surface, tiny bubbles, realistic whale texture, and a wide cinematic composition.

13. Orca pod

Create a dramatic underwater photograph of a pod of orcas swimming together through deep blue ocean water. Add sunlight rays, realistic black-and-white markings, gentle bubbles, and a wide cinematic composition.

14. Sea lions playing

Generate a playful underwater photograph of sea lions swimming and twisting through clear blue water. Add sunlight from above, bubbles, realistic fur texture, natural movement, and a joyful wide-angle composition.

15. Penguins underwater

Create a dynamic underwater image of penguins swimming swiftly through clear blue water. Add bubbles, sunlight rays, realistic feather texture, natural movement, and a wide cinematic composition.

16. Hammerhead shark

Generate a realistic underwater photograph of a hammerhead shark swimming gracefully in deep blue water. Add sunrays from above, smaller fish, gentle bubbles, detailed shark texture, and a wide cinematic composition.

17. Stingray over sand

Create a peaceful underwater image of a stingray gliding over a sandy ocean floor. Add clear turquoise water, sunlight patterns on the sand, small fish, realistic textures, and a wide-angle composition.

18. Sea otter underwater

Create a cute underwater photograph of a sea otter swimming on its back through clear blue water. Add bubbles, sunlight rays, realistic fur texture, natural movement, and a square 1:1 composition.

19. Blue whale and diver

Generate a respectful underwater image showing a scuba diver observing a massive blue whale from a safe distance. Add deep blue water, sunlight rays, realistic scale, gentle bubbles, and a wide cinematic composition.

20. Underwater eagle ray

Create a graceful underwater image of a spotted eagle ray swimming over a sandy seabed. Add clear turquoise water, sunlight patterns, small fish, realistic wing texture, and a wide cinematic composition.

Created with Gemini AI

Scuba Diving and Exploration Prompts

21. Scuba diver over coral reef

Create a realistic underwater photograph of a scuba diver exploring a colourful coral reef. Add clear water, sunlight rays, tropical fish, bubbles, diving gear details, and a wide cinematic composition.

22. Diver near shipwreck

Generate a mysterious underwater image of a scuba diver exploring a sunken wooden shipwreck. Add algae-covered wood, fish swimming through the wreck, deep blue water, light rays, and a cinematic wide-angle composition.

23. Cave diving scene

Create a dramatic underwater photograph of a scuba diver entering a clear underwater cave. Add blue light from the cave opening, rock textures, bubbles, realistic diving equipment, and a mysterious wide-angle composition.

24. Underwater photographer

Generate a realistic image of a diver photographing a colourful coral reef with an underwater camera. Add tropical fish, clear turquoise water, bubbles, sunlight rays, and a detailed documentary-photography style.

25. Freediver ascending

Create a peaceful underwater image of a freediver ascending toward the ocean surface. Add sunlight rays, deep blue water, gentle bubbles, realistic body posture, and a vertical 9:16 composition.

26. Diver with sea turtle

Create a respectful underwater photograph of a diver observing a sea turtle from a safe distance. Add a coral reef, clear water, sunlight rays, realistic details, and a wide cinematic composition.

27. Underwater archaeology

Generate a detailed underwater image of divers examining ancient stone ruins covered with algae and coral. Add clear blue water, sunlight rays, fish, realistic artefacts, and a mysterious archaeological atmosphere.

28. Diver and jellyfish

Create a dreamy underwater image of a diver observing glowing jellyfish from a respectful distance. Add deep blue water, soft light, translucent jellyfish, bubbles, and a vertical 9:16 composition.

29. Underwater cave light beams

Create a cinematic underwater image of sunlight beams entering a clear underwater cave. Add a diver silhouette, turquoise water, rock textures, gentle bubbles, and a mysterious wide-angle composition.

30. Snorkeller over shallow reef

Generate a bright underwater photograph of a snorkeller observing colourful fish over a shallow coral reef. Add clear turquoise water, sunlight rays, realistic snorkelling gear, and a cheerful tropical composition.

Created with Gemini AI

Fantasy and Mermaid Prompts

31. Mermaid in a coral garden

Create a magical underwater illustration of a mermaid with flowing teal hair and a shimmering tail swimming through a colourful coral garden. Add tropical fish, sea plants, glowing light, bubbles, and a vertical 9:16 composition.

32. Mermaid and sea turtle

Generate a dreamy underwater illustration of a mermaid swimming beside a friendly sea turtle. Add clear turquoise water, coral reefs, sunrays, bubbles, realistic marine textures, and a peaceful fantasy atmosphere.

33. Underwater fairy

Create a magical underwater illustration of a tiny fairy with translucent wings floating among glowing jellyfish. Add deep blue water, soft light, sea plants, bubbles, and a dreamy vertical 9:16 composition.

34. Underwater castle

Generate a fantasy underwater illustration of a glowing crystal castle surrounded by coral reefs and tropical fish. Add light rays, bubbles, sea plants, a mermaid swimming nearby, and a magical wide-angle composition.

35. Mermaid reading in a shell

Create a cosy underwater illustration of a mermaid sitting inside a giant open seashell and reading a book. Add glowing pearls, coral plants, small fish, soft light, and a peaceful storybook atmosphere.

36. Underwater dragon

Generate a majestic fantasy illustration of a sea dragon swimming through a deep ocean canyon. Add glowing blue scales, coral formations, small fish, light rays, and a dramatic cinematic composition.

37. Mermaid village

Create a whimsical underwater illustration of a mermaid village built among coral reefs and giant seashells. Add mermaids, fish, sea plants, glowing lanterns, clear turquoise water, and a detailed fantasy composition.

38. Underwater portal

Generate a magical underwater image of a glowing portal opening inside a coral reef. Add tropical fish, bubbles, sea plants, turquoise water, mysterious light, and a vertical 9:16 composition.

Artistic and Wallpaper Prompts

39. Underwater ocean wallpaper

Create a peaceful underwater wallpaper featuring clear turquoise water, sunlight rays, a school of tropical fish, coral formations, and gentle bubbles. Use realistic marine textures, balanced composition, and a vertical 9:16 format. Do not add text.

40. Deep ocean wallpaper

Generate a mysterious deep-ocean wallpaper with dark blue water, glowing jellyfish, distant light rays, floating particles, and soft bubbles. Use a vertical 9:16 composition, realistic textures, and a calm atmospheric mood. Do not add text.

Created with Gemini AI

41. Watercolour underwater illustration

Create a soft watercolour illustration of a coral reef with tropical fish, a sea turtle, seaweed, and sunlight rays. Use turquoise, coral pink, yellow, and green tones with delicate brush textures and a peaceful storybook atmosphere.

42. Anime underwater scene

Generate a vibrant anime-style underwater illustration of a girl swimming safely through a colourful coral kingdom. Add glowing fish, sea plants, bubbles, turquoise water, expressive eyes, and a vertical 9:16 composition.

43. Ghibli-inspired underwater scene

Create a whimsical hand-painted animated illustration of a child observing a magical underwater world through clear water. Add friendly fish, coral houses, sea plants, sunlight rays, and a peaceful storybook atmosphere. Do not imitate any specific studio or film.

44. Oil-painting underwater scene

Create a classical oil painting of a coral reef with tropical fish, a sea turtle, sunlight rays, and gentle waves above the surface. Use rich turquoise, blue, coral, and gold tones, visible brushstrokes, textured paint, and a wide landscape composition.

45. Underwater conservation poster

Create a clean educational underwater poster background showing a healthy coral reef, tropical fish, a sea turtle, and clear blue water. Use realistic marine textures, balanced composition, and a large empty area for adding a conservation message later. Do not add text.

How to Improve Underwater Images

Underwater images can sometimes look too flat, too dark, or unnatural. Improve the result by asking Gemini to adjust one element at a time, such as water clarity, light rays, colour balance, bubbles, or marine life.

Try these follow-up prompts:

Keep the subject and composition unchanged, but make the water clearer and more turquoise.

Add soft sunlight rays from the surface while preserving the coral reef and marine life.

Make the bubbles smaller, more natural, and evenly distributed.

Preserve the sea turtle’s shape and texture, but improve the lighting and background clarity.

Remove murky water and create a brighter tropical underwater atmosphere.

Keep the diver unchanged, but make the coral reef more colourful and detailed.

Change the image to a vertical 9:16 wallpaper without stretching the marine life.

Create a square 1:1 version suitable for a social media post.

Make the underwater scene look like a realistic documentary photograph rather than an illustration.

Add a school of small tropical fish in the background while preserving the main subject.

If you are editing an uploaded image, write:

Replace the background with a clear underwater coral reef scene. Keep the main subject’s shape, pose, colours, and proportions unchanged. Add realistic water light, marine life, and gentle bubbles.

Conclusion

Gemini prompts for underwater image generation can help you create coral reefs, marine animals, scuba-diving scenes, sunken ships, mermaids, underwater cities, fantasy worlds, wallpapers, and conservation visuals. The strongest prompts describe the subject, water clarity, depth, light direction, marine life, colours, camera angle, and aspect ratio.

The 45 copy-and-paste prompts in this guide cover realistic ocean photography, diving exploration, fantasy mermaid scenes, anime art, watercolour illustrations, oil paintings, and educational poster designs. Personalise each prompt by changing the marine life, location, colour palette, lighting, and image format. If the first result looks unclear or unnatural, refine the water clarity, lighting, bubbles, or background one element at a time.