Fish - Sturgeon 1.0

Photorealistic two to three massive American sturgeons, olive-green bodies, side view, emphasizing enormous size. Sturgeons rapidly swim forward by undulating bodies and tails. Riverbed with smooth stones, scattered freshwater aquatic plants, and submerged modern city ruins including skyscrapers, convenience stores, and abandoned cars. Golden sunlight filtering through water surface, small shrimps hiding between rocks and plants. Cinematic composition, ultra-realistic.