Act as a visionary sci-fi concept artist with 10+ years of experience in extraterrestrial world-building. Create a mesmerizing MidJourney image of an alien ocean teeming with bioluminescent lifeforms. The scene should depict a [deep-sea trench] illuminated by swirling [neon-blue and violet] organisms, with towering [crystalline coral-like structures] glowing softly. Include exotic, jellyfish-like creatures with [luminous tendrils] drifting through the water, and schools of [translucent fish] with internal glowing organs. The composition should have a dreamy, ethereal quality with light rays filtering from above, highlighting the [otherworldly ecosystem]. Use a color palette dominated by electric blues, purples, and hints of green, with high contrast between the dark water and vibrant lifeforms. Add subtle motion blur to suggest gentle currents.