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,