Create an image of an old mermaid sitting in a cave that is partially filled with water. She has long, flowing silver hair that cascades over her shoulders and down her back, interwoven with strands of seaweed and small pearls. Her skin is aged and weathered, with a gentle iridescent sheen, showing her years of wisdom and experience. Her tail is adorned with scales that shimmer in shades of blue and green, with hints of silver, and ends in delicate, translucent fins. She wears a top made from woven seaweed and decorated with shells and coral pieces, adding to her regal yet ancient appearance. She is seated on a smooth, flat rock that protrudes from the water, surrounded by a pool of clear, shimmering water. Around her, the cave walls are encrusted with vibrant corals, small pearls, and clusters of bioluminescent algae that cast a gentle, mystical glow. In her hands, she holds a musical instrument crafted from large, elegant seashells and strands of seaweed. The instrument resembles a harp, with strings made from thin, strong kelp that produce a hauntingly beautiful melody when plucked. Her fingers move gracefully over the strings, creating music that resonates through the cave and the water. Her eyes are closed, and her expression is one of deep concentration and serenity. Her presence exudes wisdom and ancient knowledge, as if she has seen and heard the secrets of the ocean for centuries. The cave is filled with an aura of timelessness and enchantment, making it clear that she is a sage, a seer, a keeper of underwater lore. --s 180