Octopuses have: -eight arms -bulbous heads -three hearts -blue blood -ink defenses -no bones The ability to fit into small spaces -intelligent minds (they have been recorded using tools, etc.)
Not too sure how to specify, but nonetheless those are eight characteristics of an octopus. Hope this helps :)
The mood which is established bu the setting, especially in the use of words such as deep, dusk, and black is <em>dark, gloomy, depressing, sad, scary, mysterious, </em>etc.