The dreamers are a family, Oneirodidae, of deep-sea anglerfishes in the order Lophiiformes. They are the largest and most diverse group of deep-sea anglerfish, and also the least well-known with several genera represented by only one, two, or three female specimens. They are found in deep, temperate waters around the world. They are small fishes, the largest species growing to about 20 cm (7.9 in) in total length.