Create an image of a mystical underwater world where technologically advanced sea creatures coexist with ancient mythical animals, all illuminated by shimmering bioluminescent plants.

Illustrate a curious underwater world where sea creatures with advances akin to technology harmoniously coexist with ancient mythical beasts from forgotten lores. This ethereal underwater kingdom is illuminated by a unique form of flora. These marine plants shimmer with bioluminescence, casting a beautiful glow that lights up the ocean depths.