The animals known for their ability to change color are chameleons. These reptiles belong to the family Chamaeleonidae and are famous for their dynamic color-changing ability, which serves various purposes such as camouflage, temperature regulation, and display. While chameleons can change color by expanding or contracting special pigment cells in their skin, they are not the only animals with color-changing abilities; cephalopods like octopuses and cuttlefish also exhibit remarkable color-change adaptations for communication and blending into their environment.