Hydrodynastes gigas, a rear-fanged venomous colubrid species found in South America
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Holmskioldia gigas, a flowering plant species found in Kenya and Tanzania
Thesprotia gigas | Seagrass bed with dense ''Thalassia testudinum'' and an immature queen conch (''Eustrombus gigas | Hydrodynastes gigas | Holmskioldia gigas | Entada gigas |
Entada gigas, the cœur de la mer or sea heart, a flowering liana species native to Central America, the Caribbean, northern South America and Africa
Thesprotia gigas, the grass mantis, a praying mantis species found in Brazil