Final answer:
Giant isopods are deep-sea creatures that resemble pillbugs. They belong to the class Malacostraca and have adaptations like large eyes and a sturdy exoskeleton for deep-sea survival.
Step-by-step explanation:
Giant isopods are deep-sea creatures that resemble their terrestrial counterpart, the pillbug or roly-poly. Despite their resemblance to crustaceans, giant isopods belong to the class Malacostraca, which includes other familiar marine creatures such as crabs, lobsters, and shrimp. These large isopods can grow to be quite sizable and are known for their segmented exoskeletons and their ability to curl into a ball, much like pillbugs. They have complex adaptations for surviving in the extreme conditions of the deep sea, such as large eyes that are adapted for low light environments and a sturdy exoskeleton to withstand high pressure.