P. gigas may refer to: Pangasianodon gigas, the Mekong giant catfish Patagona gigas, the giant hummingbird, a bird species Phascolonus gigas, a prehistoric Australian marsupial species Phelsuma gigas, the Rodrigues giant day gecko, an extinct diurnal gecko species that lived on the island of Rodrigues Paracamelus gigas, an extinct camelid in the genus Paracamelus. Praearcturus gigas, an extinct genus of arthropod, possibly a large scorpion. See also Gigas (disambiguation)