Design an enchanting QR code capturing the spirit of a mystical underwater world. Utilize a vibrant color palette inspired by coral reefs, incorporating shades of turquoise, coral, and gold. Infuse the QR code with intricate details reminiscent of the illustrations by Ernst Haeckel and the ethereal style of H.R. Giger. Aim for a cinematic quality with unique lighting effects, bringing an otherworldly charm to the digital artwork.