I was playing around with ideas and came up with this primate creature. I call it a Nocturnatan. They live on a planet that is always night time. Obviously, nocturnatans are nocturnal, they are completely blind, so they rely on heir sense of smell, hearing, and sensors on their back. To intimidate predators the nocturnatan has these gem like things on it's crest and stomach that glow from bioluminescence. The sensors on their back also have bioluminescence. Done in Prismacolor markers and Photoshop.