Act as a visionary concept artist with 10+ years of experience in sci-fi worldbuilding. Create a highly detailed MidJourney prompt for a futuristic underwater base, nestled on the ocean floor, surrounded by advanced submarines and marine life. The base should have [glowing bioluminescent structures], [modular domes connected by transparent tunnels], and [high-tech docking bays for submarines]. Include elements like [robotic maintenance drones], [holographic control panels], and [lush underwater flora] to enhance the scene. The lighting should be a mix of artificial neon lights and natural deep-sea glow, with a color palette dominated by blues, teals, and purples. Ensure the submarines have sleek, hydrodynamic designs with [luminescent markings] and [retractable weapon systems]. The composition should evoke a sense of wonder and cutting-edge technology, with a 4K ultra-realistic finish.