Final answer:
Cephalopods, like squids and octopuses, have the ability to change their appearance through the use of chromatophores, iridophores, and leucophores in their skin. This allows them to hide from predators and communicate with others of their species.
Step-by-step explanation:
Cephalopods, such as squids and octopuses, have the ability to change their appearance to hide from predators or communicate with other members of their species. They achieve this through the use of specialized cells called chromatophores, which can expand or contract to produce different color patterns. Additionally, cephalopods have other elements like iridophores and leucophores in their skin that reflect light and produce blue, green, and white colors. This ability to rapidly adjust their colors and patterns is an impressive feat and allows them to survive in their environments.