September 19, 2026

AI Image Prompt: Sea Turtle Swimming Over Coral Reef

Prompt

candid underwater documentary photograph of a single green sea turtle gliding over a shallow coral reef, viewed from a slightly low angle behind and below, front flippers extended mid-stroke, rear of the carapace and trailing flippers visible, no face toward camera, head turned slightly away, sunbeams filtering through crystal clear turquoise water, faint surface ripples and caustics dancing on the sandy bottom, branching staghorn corals and soft gorgonians in the foreground bokeh, small school of anthias drifting in the background, natural skin texture with barnacle speckles and subtle shell imperfections, shot on Canon EOS R5 with a 16-35mm wide lens in a Nauticam housing, water color cast, slight motion blur on the fin edges, subtle film grain, imperfect asymmetric framing, real life moment witnessed by a diver, no human elements, no text

画像モデル: FLUX dev (Black Forest Labs)

Stable Diffusion 再現情報 (Replicate)

完全プロンプト (SDに実際に送信したテキスト)

adult, mature features, safe for work, fully clothed in scene-appropriate everyday attire, natural authentic photograph, candid moment, shot on 35mm film, slight grain, natural depth of field, candid underwater documentary photograph of a single green sea turtle gliding over a shallow coral reef, viewed from a slightly low angle behind and below, front flippers extended mid-stroke, rear of the carapace and trailing flippers visible, no face toward camera, head turned slightly away, sunbeams filtering through crystal clear turquoise water, faint surface ripples and caustics dancing on the sandy bottom, branching staghorn corals and soft gorgonians in the foreground bokeh, small school of anthias drifting in the background, natural skin texture with barnacle speckles and subtle shell imperfections, shot on Canon EOS R5 with a 16-35mm wide lens in a Nauticam housing, water color cast, slight motion blur on the fin edges, subtle film grain, imperfect asymmetric framing, real life moment witnessed by a diver, no human elements, no text

ネガティブプロンプト

child, children, kid, minor, underage, teen, preteen, toddler, baby, loli, shota, young girl, young boy, little girl, little boy, school uniform on young face, nude, naked, topless, bottomless, nipples, areola, genitalia, penis, vagina, vulva, porn, hardcore, sex act, cum, orgasm, hentai, lewd, nsfw, real person, celebrity, actor, actress, politician, real photograph of celebrity, gore, gory, bloody, decapitation, beheading, torture, self-harm, bestiality, zoophilia, necrophilia, shirtless, bare chest, bare torso, bare back, topless man, underwear visible, panties, thong, lingerie, bra alone, sports bra as outerwear, swimsuit, bikini, monokini, swimwear, see-through clothing, transparent clothing, wet shirt clinging, exposed midriff in office, low-cut neckline, deep cleavage, undressing, partially undressed, clothing falling off, underwear as outerwear, lowres, bad anatomy, bad hands, extra fingers, six fingers, seven fingers, fewer fingers, four fingers, fused fingers, twisted fingers, deformed hand, mutated hand, malformed hand, extra limbs, missing limbs, watermark, signature, text

上記の完全プロンプトとネガティブプロンプトを Replicate / ComfyUI / Forge / Automatic1111 等に貼り付けると、近い結果を再現できます (シードや解像度の違いで完全一致はしません)。

このプロンプトは、透明度の高いターコイズ色の水中で浅い珊瑚礁の上を泳ぐ1匹のアオウミガメを描くための作例です。ポイントは水中カメラの言語化にあります。「Canon EOS R5 + 16-35mm 広角レンズのハウジング撮影」「砂底に映るコースティクス」「水中の色被り」を入れることで、ツルツルしたAIレンダリングではなく実際のダイビング写真の質感に寄ります。「ヒレの先のかすかな動体ブレ」「フィルムグレイン」も加えると、FLUX や SDXL が海の被写体で出しがちな過剰にシャープなプラスチック感を抑えられます。

構図の指定も重要です。「やや低い位置から後方下側、甲羅の後縁と後ろ脚が見え、顔はこちらを向いていない」と明記することで、ストックフォトのような正面スマイル構図に固定されるのを防ぎます。手前に枝状サンゴ、奥にハナダイの群れをボケで配置すると、単調な青一色ではなく奥行きのある生きているリーフになります。

推奨LoRA: 珊瑚礁・水中写真系LoRAでサンゴのディテールとコースティクスが向上します。動物の解剖LoRAを併用すると、ヒレが増えたり甲羅が歪んだりする失敗を減らせます。Sampling steps は25〜35、CFG は5〜7程度に留めると、粒状感と水中の自然な明るさが保てます。

Prompt Overview

This prompt captures a single green sea turtle swimming over a shallow coral reef in crystal clear turquoise water. The key is the underwater camera language: "shot on Canon EOS R5 with a 16-35mm wide lens in a Nauticam housing", caustics on the sandy bottom, and a light water color cast all push the model toward a real dive photo rather than a glossy AI render. Adding "slight motion blur on the fin edges" and "subtle film grain" prevents the plastic-looking, overly sharp result that FLUX and SDXL tend to produce for marine subjects.

Composition matters here. The phrase "viewed from a slightly low angle behind and below, rear of the carapace and trailing flippers visible, no face toward camera" keeps the turtle from turning into a smiling stock-photo pose. Mentioning "branching staghorn corals" and "small school of anthias" in the foreground and background bokeh layers the depth so the reef feels alive instead of empty blue.

Optional LoRAs: a coral reef or underwater photography LoRA improves coral detail and caustic realism, while a wildlife/animal anatomy LoRA helps avoid extra flippers or malformed shells. Keep sampling steps moderate (25-35) and CFG around 5-7 to preserve the natural grain and water luminance.

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