Pleuronectiformes is an order of fish commonly known as flatfish, which includes species like flounder and halibut. These fish are characterized by their flattened bodies and both eyes located on one side of their head. They are primarily found on the ocean floor and have adapted to a benthic lifestyle, often blending in with their surroundings for camouflage. Flatfish undergo a unique transformation during their development, where one eye migrates to the other side of the body. This adaptation allows them to lie flat against the seabed while keeping both eyes on the lookout for predators and prey. They are important in marine ecosystems and are also significant in commercial fishing.