Catalog number USNM 206093, a holotype Etmopterus perryi (dwarf lanternshark) specimen from the National Fish Collection at the Smithsonian Institution National Museum of Natural History. Here, the specimen rests on the palm of the Fishes Division's collections specialist Julie Mounts. With an adult length around eight (8) inches, the dwarf lanternshark, like the mature specimen shown, is the smallest shark species currently known.