T. gigas

T. gigas may refer to:
 * Tachypleus gigas, an Asian species of horseshoe crab
 * Thamnophis gigas, the giant garter snake, a reptile of the western United States
 * Thesprotia gigas, the grass mantis, a praying mantis species found in Brazil
 * Tridacna gigas, the giant clam or pa’ua, the largest living bivalve mollusk species
 * Tapinauchenius plumipes, a South American tarantula formerly designated as Tapinauchenius gigas