(medium full shot) of (captivating pearlescent aquatic creature) with iridescent skin, seaweed strands, tentacle-like fins, elongated snout, ethereal fins, ethereal glow, sea anemones, set in  a hidden coral lagoon, with gentle waves, vibrant corals, glowing fish, tranquil ambiance, at night, ,Masterpiece,best quality, photo, realistic, very aesthetic