Octopi freak me out.
Described as what is essentially just a big clever brain with arms, they can not only squeeze their entire bodies through a hole the size of a quarter, they can also open jars, solve puzzles, communicate their emotions, have favorite toys, and this:
They change color to blend into their surroundings, plus they can perfectly match texture too.
They also seem to be working on becoming bipedal. Great, just great.
(notice how the octopus is using 2 legs to walk and is mimicking seaweed for camouflage with the other 6) I'm glad that they're not air-breathers - they'd be picking your locks, sneaking into your house, and raiding your fridge in the middle of the night. And then when you venture down into the kitchen to figure out just what that noise was, the octopus would go poof! and disappear into the linoleum or morph into a head of lettuce in the veggie bin.