Create a dark and terrifying underwater scene with a realistic style. The setting should be deep in the ocean where very little light penetrates. Show eerie, ghostly silhouettes of sea creatures in the background, with some having glowing eyes. Include a sunken shipwreck partially buried in the sand, with its broken masts and tattered sails adding to the haunting atmosphere. Add details like eerie, floating seaweed and ominous shadows cast by unseen creatures. The water should appear murky and dark, with beams of dim light piercing through the gloom, highlighting the sense of dread and mystery in this underwater world. In the foreground, depict a scary, unknown creature with menacing features, partially obscured by the darkness, evoking fear and the unknown.