**Prompt:** A terrifying octopus creature lurking in the deep sea, with large, sharp teeth and massive tentacles dripping with slime. The creature, the size of a small boat, has a humanoid form and a bulging head that glows with an eerie green light. The creature's skin is rough and scaly, covered in ominous markings and dark, swirling patterns. The background is dark and murky, with just a few faint shafts of light penetrating the gloom.
In terms of texture, the prompt should include words such as slimy, scaly, rough, and ominous to describe the creature's skin. Additional details about the creature's appendages, such as its massive tentacles and sharp teeth, should also be included.
For image quality, use high-res tags like "ultra-detailed" and "photorealistic". In terms of style, consider adding "horror" or "dark fantasy" to set the mood appropriately. With regards to lighting, the creature's glowing green head should be highlighted, while the rest of the background should be kept dim and murky to heighten the sense of terror.