Underwater Forest Stream Photography

Shot with a high-definition underwater camera, this prompt captures real underwater natural scenery in a {argument name="environment description" default="clear shallow stream next to a tropical primeval forest"}.

Vertical composition, 3:4 aspect ratio, medium-to-long shot. The lens is slightly below the water surface, showing the shimmering bottom of the water surface above with realistic water wave refraction and natural reflections.

Sunlight shines diagonally into the water from the top right, forming soft beams and underwater spots. Dark reflections and shadows of large tree branches occupy part of the composition in the upper right.

In the middle is clear and quiet stream water with slight suspended particles and {argument name="number of fish" default="5-8"} native freshwater small fish swimming naturally, mainly gray-silver and light brown, varying in size and distance, not forming an organized school. On the stream bed, deep green, yellow-green, and brownish-green water plants grow naturally, swaying gently with the current, distributed naturally unlike an artificial aquarium.

The bottom consists of gray-brown fine sand, gravel, pebbles, and several naturally shaped stones with slight algae marks and signs of water erosion. Multiple springs at the bottom show fine sand billowing slowly from small holes, creating light sand clouds and local water disturbances, not white smoke, steam, or large bubbles.

Natural landscape live-action photography, high-end natural documentary feel, close to National Geographic ecological photography. Features transparent water, natural lighting, restrained colors, realistic underwater optical effects, slight graininess, natural depth of field, and high-definition details.

No people, no buildings, no artificial traces, no text, no borders, no LOGO. Avoid CG feel, aquarium look, seabed coral, exaggerated fish schools, oversaturated greens, dreamy lighting effects, or plastic water plants.

水下高清摄影相机拍摄，{argument name="环境描述" default="热带原始森林旁清澈浅溪涧"}内的真实水下自然风光。

竖向构图，比例3:4，中远景。镜头略低于水面，画面上方可见波光粼粼的水面底部，真实水波折射与自然反光。

阳光从右上方斜射入水中，形成柔和光束和水下光斑，右上方有大树枝干的暗色倒影与阴影，占据部分构图。

中部是清澈静谧的溪水，有轻微悬浮颗粒，{argument name="鱼类数量" default="5-8条"}原生态淡水小鱼自然游动，灰银色、浅褐色为主，大小和距离不同，不形成整齐鱼群。溪底有自然生长的深绿、黄绿、褐绿色水草，随水流轻轻摆动，分布自然，不像人工水族箱。  

底部为灰褐色细砂、碎石、鹅卵石和几块造型自然的石头，石头带轻微藻痕和水流磨蚀感。底部有多个泉眼，表现为细沙从小孔处缓慢翻涌，形成轻微沙粒云和局部水流扰动，不是白烟，不是蒸汽，不是大量气泡。  

自然风光实景拍摄，高级自然纪录片摄影感，接近国家地理真实生态摄影，水体通透，光线自然，色彩克制，真实水下光学效果，轻微颗粒感，自然景深，高清细节。

无人物、无建筑、无人工痕迹、无文字、无边框、无LOGO。避免CG感、水族箱感、海底珊瑚、夸张鱼群、过饱和绿色、梦幻光效、塑料水草。