An ancient deep-sea diving helmet, heavily encrusted with barnacles, coral, and glowing bioluminescent algae, lies abandoned on the ocean floor. The thick glass portholes of the helmet are fogged and cracked, reflecting the eerie blue-green glow of the abyss. Strange, otherworldly shadows loom in the murky depths beyond, hinting at the presence of something watching from the darkness. Swirling schools of luminescent fish dart past, their light casting eerie patterns on the rusted metal. Tiny air bubbles rise from the helmet, as if it still holds a secret, lost to the deep. The scene is shrouded in an ethereal, dreamlike atmosphere, capturing the mystery and beauty of the forgotten ocean depths.