" Octopus slime is sort of a cross between drool and snot. But in a nice way. And it’s very useful. It helps to be slippery if you’re squeezing your body in and out of tight places. Slime keeps the octopus moist if it wants to emerge from the water, which some species of octopus do with surprisingly frequency in the wild. "

― Sy Montgomery , The Soul of an Octopus: A Surprising Exploration Into the Wonder of Consciousness