Deep-Sea Jellyfish Seedance

A deep-sea coral reef scene in a tropical underwater world with a blue overall tone. Large areas of healthy, thriving colorful living coral, including branching coral, brain coral, plate coral, and soft sea-fan coral. Schools of tropical fish swim naturally through the reef. The foreground is clear and vivid; the background gradually shifts blue-gray with reduced contrast. Natural light from above is filtered through seawater, forming soft volumetric beams. Tiny suspended particles and slight water movement are visible. Soft coral sways gently and fish movement is smooth and coordinated. Add a group of translucent pale-purple glowing jellyfish, 8 to 12 in total, slowly appearing in different sizes. Their umbrella bodies pulse gently with flowing tentacles, moving elegantly through the coral reef while the whole scene stays calm, realistic, and dreamlike.