Exceptionally imaginative, captivating, fantasy art, underwater landscape scene, mermaids singing atop an extraordinary underwater metropolis called "Poseida", crystal palaces, floating islands, bioluminescent sea life, whimsical architecture, calming ocean currents, serene ambiance, soft ethereal light, prismatic hues, digital art medium, Soft light, Yellow hue, Googie Architecture, F/8, Masterful detail by: Eileen Agar, Miles Aldridge
(Mermaids singing underwater  city:1.9).