A. gigas

A. gigas may refer to:

Plants

 * Amorphophallus gigas, a species of the genus Amorphophallus

Animals

 * Acerentulus gigas
 * Aethilla gigas, provisionally accepted name; see Aethilla (butterfly)
 * Agdistis gigas, provisionally accepted name for a moth species (Agdistis manicata)
 * Agylla gigas, provisionally accepted name
 * Alveopora gigas, see IUCN Red List vulnerable species (Animalia)
 * Anopheles gigas
 * Apagomerina gigas
 * Arapaima gigas, arapaima, pirarucu, or paiche, a freshwater fish
 * Archispirostreptus gigas (synonym), the giant African millipede
 * Argyropelecus gigas, giant hatchetfish or greater silver hatchetfish
 * Arius gigas
 * Athletes gigas, provisionally accepted name; see Athletes (moth)
 * Avelia gigas, a karyorelict ciliate in genus Avelia
 * Ancyloscelis gigas, a Southern Brazilian bee