Octopi are the ultimate masters of disguise, with the uncanny ability to change the color and texture of their skin to blend seamlessly with their surroundings.
They have highly sensitive suction cups on their arms, the suction cups allow them to grasp, manipulate, and precisely explore objects resembling human fingertips.
Trading its plastic cup for a sea shell. After being given a few options, it finds a shell that is just right, it releases its hold on the plastic cup and grasps the shell.