Isopoda is an order of crustaceans that includes familiar species like pill bugs and woodlice. They are characterized by their flattened bodies and segmented exoskeletons, which can range in size from a few millimeters to several centimeters. Isopods can be found in various environments, including marine, freshwater, and terrestrial habitats. These creatures are primarily scavengers, feeding on decaying organic matter. Isopods play an essential role in ecosystems by helping to break down and recycle nutrients. Some species are also known for their unique adaptations, such as the ability to survive in extreme conditions, making them a fascinating subject of study in marine biology and ecology.