Three adult Formosan salmon (Oncorhynchus masou formosanus) swimming entirely underwater, horizontal side view, close-up perspective, large deep-colored bodies, ultra-realistic fish scales and textures, soft underwater lighting filtering through the water, detailed currents and gentle ripples, natural riverbed with stones, pebbles, and submerged plants, slight motion blur to enhance movement, cinematic depth of field, high detail, serene yet lively underwater atmosphere, fish interacting naturally, river teeming with life
