Pleuronectidae and they sink to the bottom. They are found on the bottoms of oceans around the world, with some species, such as the Atlantic halibut, "Hippoglossus hippoglossus", being found down to . The smaller species eat sea-floor invertebrates such as polychaetes and crustaceans, but the larger righteye flounders, such as "H. hippoglossus", which grows up to in length, feed on other fishes and cephalopods, as well. They include many important commercially fished species, including not only the various fish called flounders, but also the European plaice, the halibuts, the lemon sole, the common dab, the Pacific Dover sole, and the
Pacific sand sole Pacific sand sole The Pacific sand sole, "Psettichthys melanostictus", is the only fish in the genus, "Psettichthys", in the, "Pleuronectidae", family. It is a flatfish and inhabits northeastern Pacific waters where it lives on sandy bottoms. The Pacific sand sole, belongs to the order "Pleuronectiformes," and the family "Pleuronectidae". They are considered a flatfish due to their body shape, just like Hippoglossus (halibuts), Solea (soles), and Platichthys (flounders). This fish can get over 62.95 cm (24.78 in) in length and on average this fish can weigh approximately 2.484 kg (5.476 lbs). Their dorsal side, which houses both of their eyes,