AI Video Prompts for Underwater Scenes

Seedance 2.0 prompts for underwater video — ocean exploration, coral reef diving, sea creature encounters, and the depth-stratified light physics that make aquatic environments cinematically unlike anything above the surface.

Underwater cinematography is governed by physics that don't exist above the surface: light bends at the water interface, scatters through water column density, and loses wavelengths with increasing depth. Red disappears by 5 meters, orange by 10, yellow by 20 — leaving blue and green as the only colors available at depth unless an artificial light source compensates. Most underwater AI video prompts fail because they describe the scene as if light behaves normally — specifying "golden sunlight" at depth, or "warm tones" in an open ocean environment where those wavelengths physically can't reach. The technique that fixes this is depth-stratified color specification: naming the light quality by depth rather than by source type. At the surface layer (0–3m), light still carries the full visible spectrum, but refraction at the air-water interface creates caustic patterns — the moving net of bright lines cast on sandy bottoms or submerged objects when surface ripples act as lenses. Naming caustics by depth and motion — "slow-moving caustic light patterns across the coral at 2m depth, rippling from surface chop above" — tells Seedance both the optical phenomenon and the mechanism producing it. These patterns are the visual signature of shallow-water environments, and their absence makes a scene read as deeper or as artificially lit. At mid-water depth (5–20m), the loss of red and orange shifts the entire palette toward cyan and blue. This is the depth range where dive footage looks "underwater" in the way that underwater photography is typically styled — the depth where recreational scuba diving happens and where coral reef ecosystems are most dense. Prompts in this depth range should specify the cyan-dominant palette explicitly: not "colorful coral" but "cyan-dominant lighting with the coral's orange and red tones appearing as desaturated grey-green — artificial dive light from below-right restoring those wavelengths in a 60-degree cone." The dive light is a practical light source that underwater cinematographers use to restore the lost warm wavelengths; naming it as a light source with a cone angle gives Seedance a lighting model it can render accurately. Negative space in underwater environments is water itself — the blue-to-black gradient of the open water column beyond the lit subject. Unlike above-water negative space (sky, walls, background out of focus), the water column has particle density: suspended organic matter and microorganisms scatter light and create volumetric rays when a surface light source is above. "Shafts of sunlight from the surface at 45 degrees, scattered by suspended particles, cutting through the blue water column" is a volumetric light spec that Seedance can render because it names the source (surface sun), the angle (45 degrees), the medium (particle-dense water column), and the visual result (shafts of light). This is the most iconic underwater cinematography element — the god-ray — and it requires naming all four components. Buoyancy is the defining physical behavior of underwater environments, and its absence in AI video is the most common tell that a scene isn't really underwater. Natural buoyancy means: no object falls straight down — everything descends in a slow, drifting arc. Hair fans and suspends upward and outward. Fabric billows in multiple directions simultaneously, constrained by nothing. A piece of paper released from a hand doesn't flutter down — it rotates slowly through three axes as it descends, catching micro-currents. Specifying buoyancy behavior — "her hair fans upward and outward in slow suspension, slight lateral drift from current" — produces the visual cue that positions the scene in water rather than air, even without other underwater indicators. Depth-cued atmospheric perspective is the underwater equivalent of fog in landscape video. With increasing depth, contrast decreases, color shifts to monochromatic blue, and the background disappears into the water column. A shallow-focus camera at 15m depth looking toward the surface has a background that transitions from lit subject at the focal point, through a mid-blue zone, into the lighter blue of the surface above — a specific atmospheric gradient that reads as underwater even without any visible sea creatures or coral. Naming this atmospheric transition — "camera at 15m depth, subject sharp in foreground, water column softening to mid-blue at 5m behind, surface light a diffuse bright zone above" — gives the model a three-layer depth gradient that positions the camera in the water column without requiring explicit sea floor or surface elements. Underwater sound design informs visual pace: the characteristic sounds of underwater environments — bubbles rising from a regulator, the distant hum of boat engines above, the crackling of shrimp colonies on coral, the low thrum of large marine mammals — imply specific visual pacing and energy levels. A scene with regulator bubbles implies a diver in frame or just off-frame; the visual pace should be quiet and deliberate. A scene with whale song implies distant-scale context; the visual should be wide and the subject motion slow. Including sound design in underwater prompts ("background of distant regulator bubbles, low-frequency whale resonance from below") gives Seedance additional context for the scene's energy and pace.