# Jellyfish artwork

The two original background gradients have been replaced with black water, cyan-edged obsidian and violet sea fans. See [current background assets and redraw prompts](jellyfish-background-redraw.md). The fish artwork below is unchanged; the original background prompts are retained for history.

Six AI-generated jellyfish illustrations with exhibit lighting, preserved translucent alpha and baked highlights. These are artistic interpretations, not scientific identification photographs. Sources are 1024 × 1536; the atlas is 3072 × 3072 with 64-pixel transparent gutters. Backgrounds are smooth image-generated plates resampled to 3840 × 2160 JPEG. No runtime bloom or blur.

Assets: `src/main/immutable/app/fishtank/jelly-atlas.png`, `jelly-midnight.jpg`, `jelly-dusk.jpg`, `jelly-preview.jpg`.

Shape references: [Monterey Bay Aquarium jellies](https://www.montereybayaquarium.org/animals-the-ocean/animals-a-to-z/jellies), [Aquarium of the Pacific lagoon jelly](https://www.aquariumofpacific.org/onlinelearningcenter/species/spotted_lagoon_jelly).

## Exact generation prompts

### jelly-moon

Photorealistic living JELLYFISH aquarium sprite, a single isolated animal on a REAL TRANSPARENT PNG alpha background. Portrait 1024x1536 highest resolution. Camera straight-on side view, jelly upright, rounded bell at TOP, tentacles trailing vertically DOWN in graceful loose curves, no rotation. Whole animal and ALL filament tips inside image with at least 10% empty margin. Bell apex near y12%, bell rim near y32%; long tentacles can trail to y88%. Center axis at x50%. TRANSLUCENT gelatinous bell with delicate visible internal anatomy and thin luminous rim; dark transparent bell tissue with jewel-like colored rim lighting, fine detailed folds, flowing wispy oral arms and threads. OLED aquarium presentation: brilliant restrained edge highlights and soft local bloom already baked into image, no broad fog, no opaque black silhouette, no solid backdrop, no painted checkerboard, no text, no other animals. Refined museum aquarium photography, delicate organic asymmetry, not a cartoon, not sci-fi. Aquarium exhibit lighting may enhance the natural coloration, keeping an anatomically recognizable specimen. Moon jelly, Aurelia-like shallow translucent saucer bell with four pale horseshoe-shaped internal rings, luminous ice blue and soft cyan rim, delicate frilled short oral arms and fine short marginal tentacles. Do not invent long thick sea-nettle arms for this species; a lighter compact silhouette. Bell is near transparent glass with blue-white edges.

### jelly-sea-nettle

Photorealistic living JELLYFISH aquarium sprite, a single isolated animal on a REAL TRANSPARENT PNG alpha background. Portrait 1024x1536 highest resolution. Camera straight-on side view, jelly upright, rounded bell at TOP, tentacles trailing vertically DOWN in graceful loose curves, no rotation. Whole animal and ALL filament tips inside image with at least 10% empty margin. Bell apex near y12%, bell rim near y32%; long tentacles can trail to y88%. Center axis at x50%. TRANSLUCENT gelatinous bell with delicate visible internal anatomy and thin luminous rim; dark transparent bell tissue with jewel-like colored rim lighting, fine detailed folds, flowing wispy oral arms and threads. OLED aquarium presentation: brilliant restrained edge highlights and soft local bloom already baked into image, no broad fog, no opaque black silhouette, no solid backdrop, no painted checkerboard, no text, no other animals. Refined museum aquarium photography, delicate organic asymmetry, not a cartoon, not sci-fi. Aquarium exhibit lighting may enhance the natural coloration, keeping an anatomically recognizable specimen. Pacific sea nettle: rounded honey-amber bell, delicate radial orange streaks, long frilly golden peach oral arms and many hair-fine burnt-orange trailing tentacles. Long elegant flowing silhouette, backlit peach-gold against darkness, dark transparent bell interior and crisp warm amber edges.

### jelly-purple-striped

Photorealistic living JELLYFISH aquarium sprite, a single isolated animal on a REAL TRANSPARENT PNG alpha background. Portrait 1024x1536 highest resolution. Camera straight-on side view, jelly upright, rounded bell at TOP, tentacles trailing vertically DOWN in graceful loose curves, no rotation. Whole animal and ALL filament tips inside image with at least 10% empty margin. Bell apex near y12%, bell rim near y32%; long tentacles can trail to y88%. Center axis at x50%. TRANSLUCENT gelatinous bell with delicate visible internal anatomy and thin luminous rim; dark transparent bell tissue with jewel-like colored rim lighting, fine detailed folds, flowing wispy oral arms and threads. OLED aquarium presentation: brilliant restrained edge highlights and soft local bloom already baked into image, no broad fog, no opaque black silhouette, no solid backdrop, no painted checkerboard, no text, no other animals. Refined museum aquarium photography, delicate organic asymmetry, not a cartoon, not sci-fi. Aquarium exhibit lighting may enhance the natural coloration, keeping an anatomically recognizable specimen. Purple-striped jelly: translucent clear domed bell with distinct radial magenta-purple stripes and violet rim, long lavender ruffled oral arms, delicate extended purple fine tentacles. Intensely beautiful purple-white edges under aquarium exhibit lighting, realistic supple gelatinous anatomy.

### jelly-lagoon

Photorealistic living JELLYFISH aquarium sprite, a single isolated animal on a REAL TRANSPARENT PNG alpha background. Portrait 1024x1536 highest resolution. Camera straight-on side view, jelly upright, rounded bell at TOP, tentacles trailing vertically DOWN in graceful loose curves, no rotation. Whole animal and ALL filament tips inside image with at least 10% empty margin. Bell apex near y12%, bell rim near y32%; long tentacles can trail to y88%. Center axis at x50%. TRANSLUCENT gelatinous bell with delicate visible internal anatomy and thin luminous rim; dark transparent bell tissue with jewel-like colored rim lighting, fine detailed folds, flowing wispy oral arms and threads. OLED aquarium presentation: brilliant restrained edge highlights and soft local bloom already baked into image, no broad fog, no opaque black silhouette, no solid backdrop, no painted checkerboard, no text, no other animals. Refined museum aquarium photography, delicate organic asymmetry, not a cartoon, not sci-fi. Aquarium exhibit lighting may enhance the natural coloration, keeping an anatomically recognizable specimen. Spotted lagoon jelly: oval translucent warm cream bell with many small distinct white spots, eight fluffy branching short oral arms with clubbed ends below. Pearl white with soft champagne-gold and turquoise exhibit rim light. Compact stocky jelly, no long sea-nettle-style threads.

### jelly-crystal

Photorealistic living JELLYFISH aquarium sprite, a single isolated animal on a REAL TRANSPARENT PNG alpha background. Portrait 1024x1536 highest resolution. Camera straight-on side view, jelly upright, rounded bell at TOP, tentacles trailing vertically DOWN in graceful loose curves, no rotation. Whole animal and ALL filament tips inside image with at least 10% empty margin. Bell apex near y12%, bell rim near y32%; long tentacles can trail to y88%. Center axis at x50%. TRANSLUCENT gelatinous bell with delicate visible internal anatomy and thin luminous rim; dark transparent bell tissue with jewel-like colored rim lighting, fine detailed folds, flowing wispy oral arms and threads. OLED aquarium presentation: brilliant restrained edge highlights and soft local bloom already baked into image, no broad fog, no opaque black silhouette, no solid backdrop, no painted checkerboard, no text, no other animals. Refined museum aquarium photography, delicate organic asymmetry, not a cartoon, not sci-fi. Aquarium exhibit lighting may enhance the natural coloration, keeping an anatomically recognizable specimen. Crystal jelly: very transparent shallow umbrella-like bell with fine radial canals and a delicate bright mint-green/cyan rim dotted with pale points, many fine transparent thread-like tentacles descending well below. Elegant airy glass-like body, almost invisible inside, bright thin edges with very subtle mint bloom.

### jelly-flower-hat

Photorealistic living JELLYFISH aquarium sprite, a single isolated animal on a REAL TRANSPARENT PNG alpha background. Portrait 1024x1536 highest resolution. Camera straight-on side view, jelly upright, rounded bell at TOP, tentacles trailing vertically DOWN in graceful loose curves, no rotation. Whole animal and ALL filament tips inside image with at least 10% empty margin. Bell apex near y12%, bell rim near y32%; long tentacles can trail to y88%. Center axis at x50%. TRANSLUCENT gelatinous bell with delicate visible internal anatomy and thin luminous rim; dark transparent bell tissue with jewel-like colored rim lighting, fine detailed folds, flowing wispy oral arms and threads. OLED aquarium presentation: brilliant restrained edge highlights and soft local bloom already baked into image, no broad fog, no opaque black silhouette, no solid backdrop, no painted checkerboard, no text, no other animals. Refined museum aquarium photography, delicate organic asymmetry, not a cartoon, not sci-fi. Aquarium exhibit lighting may enhance the natural coloration, keeping an anatomically recognizable specimen. Flower hat jelly: small translucent violet-striped hemispherical bell adorned around rim with curled fluorescent pink and lime tipped slender tentacles, some fine pink threads extend downward around short delicate oral arms. Distinctive elegant curl-tipped flower-hat silhouette, translucent body, pink-lavender aquarium lighting, no opaque body.

### jelly-midnight

Background plate for a premium OLED jellyfish aquarium display. Widescreen 16:9, maximum resolution 3840x2160. A nearly pure BLACK, empty, carefully lit museum jellyfish tank, camera looking through front glass. No jellyfish, fish, animals, tentacles, coral, plants, rocks, gravel, sand or objects: all animals will be animated separately. No frame, no border, no room, no water surface or waterline, no visible static reflections. 90% of the image near-black, broad smooth subtle light falloff gives water depth. One exceedingly faint diffuse colored glow from aquarium lighting at the outer lower corners fading seamlessly into total black across central and upper water. Very clean smooth photographic tones, no noise, no grain, no texture, no particles, no bubbles, no stars, no bright spots, no text. The emptiness and OLED blacks are intentional. Make the tank an elegant minimal stage for luminous animals, not an ocean landscape or nebula. Lighting: barely visible deep midnight BLUE and cool teal wash concentrated low at the left edge, surrounding space black. Dark aquarium calm.

### jelly-dusk

Background plate for a premium OLED jellyfish aquarium display. Widescreen 16:9, maximum resolution 3840x2160. A nearly pure BLACK, empty, carefully lit museum jellyfish tank, camera looking through front glass. No jellyfish, fish, animals, tentacles, coral, plants, rocks, gravel, sand or objects: all animals will be animated separately. No frame, no border, no room, no water surface or waterline, no visible static reflections. 90% of the image near-black, broad smooth subtle light falloff gives water depth. One exceedingly faint diffuse colored glow from aquarium lighting at the outer lower corners fading seamlessly into total black across central and upper water. Very clean smooth photographic tones, no noise, no grain, no texture, no particles, no bubbles, no stars, no bright spots, no text. The emptiness and OLED blacks are intentional. Make the tank an elegant minimal stage for luminous animals, not an ocean landscape or nebula. Lighting: barely visible deep VIOLET and muted plum wash low at the right edge, surrounding space black. Soft dark aquarium ambience.