Real-time 3D pool with jelly sea animals and procedural water effects

[Note: the creator shared a partial prompt. Wording below is theirs.] GOAL: Build "Jelly Pool": a single self-contained HTML file. MOTION: It shows a sunlit outdoor swimming pool in real-time 3D, and the user drops soft-body jelly sea animals into it: a marlin, a humpback whale, an orca and a hammerhead shark. Each animal is made of clear, wobbly jelly that refracts the pool behind it and has a milky core and dark glossy eyes. It splashes in, dives and swims with a travelling body wave, and wobbles as it turns. The whales surface to breathe and blow spray. Everything is procedural: no image, model or sound files. English UI. TECH - three.js r128 from cdnjs (UMD build, global THREE), WebGL 2 required. If WebGL 2 is missing, show a friendly fallback message. - Soft-body physics runs in Web Workers created from a blob URL. Put the worker source in a tag in the page and use navigator.hardwareConcurrency − 1 workers, clamped to 1–3. Spread the animals across the workers and give each new animal to the least busy one. - Each step, the main thread sends the swim frames to the workers. The workers reply with packed Float32Arrays as transferables. - Use adaptive quality: lower the internal render scale when frames run slow. On coarse-pointer or low-core devices, use coarser jelly meshes and cap the pool at 6 animals instead of 8. THE POOL - A rounded-rectangle pool under a pitched perspective camera, fitted to the screen in any aspect ratio. The floor slopes from a shallow end on the left (≈0.55 m) to a deep end on the right (≈1.85 m). - Pale stone deck. Coping blocks with a rounded bullnose edge overhanging the waterline, standing a little proud of the deck, with a soft shadow along their outer edge and darker splash-wet stone near the water. - Shell: procedural mosaic tiles in a shader (field, border and a darker waterline band), each tile with bevel normals and a glassy glaze highlight. - Dappled shadow from a palm crown leaning over one corner, moving gently in the breeze. - Water simulation: a GPU heightfield wave equation on ping-pong float render targets, damped, with walls as boundaries. Touching or dragging across the water makes ripples. Add a slow circulation from return jets and gentle lapping swells. - Water surface: computed normals, refraction of the shell and the animals beneath (with the deep end bluer and darker), Fresnel reflection of the sky, and a reflection of the coping and the tiled wall band. Add a sharp sun glint, a meniscus and coping shadow along the walls, and foam patches from splashes. - Caustics: refract a grid of sun rays through the surface heightfield onto the floor into a caustic texture (area-change brightness). Use it to light the shell and anything under water. - Tools on the water: - Breeze: wind ripples from scrolling noise gradients. - Rain: random drop impulses plus ring ripples, and rain sound. - Whirlpool: a vortex that swirls the surface and the animals, a darkened funnel and spiral foam arms. THE ANIMALS (soft bodies) - Define each species as a sig