A decapod is a type of crustacean that belongs to the order Decapoda, which means "ten-footed." This group includes familiar marine animals such as crabs, lobsters, and shrimp. Decapods typically have ten limbs, which include eight walking legs and two pincers or claws. They are found in various aquatic environments, from oceans to freshwater habitats. Decapods play a significant role in their ecosystems as both predators and prey. They are important for the food chain, providing nourishment for larger animals like fish and birds. Additionally, many decapods are economically important to humans, serving as a source of food in various cuisines around the world.