P. gigas

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.