dark dark blue ocean background, deep underwater, blood in the water, very terrifying demonic xenomorph giant octopus cenobite tearing a great white shark apart, splattered with blood, full body portrait showing entire scary monster, neo-expressionistic, maximalist, horror monster masterpiece, trending on DeviantArt, 4K resolution, dark cinematic, hyperrealism, octane render, volumetric lighting, ultra-detailed, chiaroscuro, in the style of Giger and Ralph Steadman and Da Vinci,