Giant Day Gecko
Phelsuma grandis
The giant day gecko is a stunningly beautiful Madagascar species featuring vibrant lime-green coloration with distinctive red markings on its back. As the largest of the day geckos, they reach 10-12 inches and make impressive display animals. Unlike most popular pet geckos (leopard geckos, crested geckos), giant day geckos are diurnal and arboreal, actively hunting and basking during the day. They are a look-but-don't-touch species - their skin is extremely delicate and can tear easily with handling, plus they are fast and flighty. Giant day geckos thrive in planted bioactive vivaria where their brilliant colors and active behavior make them living jewels.
lizard
omnivore
10-12 inches
10-20 years
diurnal
skittish
5/10
Recommended Setup
Essential gear for Giant Day Gecko
Curated picks for a complete first-time setup. Affiliate links — purchases support the site at no extra cost to you.
Recommended Enclosure
24x18x36 vertical planted vivarium — the foundation of any successful setup.
View on AmazonSubstrate
Bioactive mix (ABG) ideal. Coconut fiber works. Planted vivarium recommended. substrate matched to natural habitat.
View on AmazonThermostat
Non-negotiable safety. Controls heat sources to prevent fires and burns. The Inkbird ITC-308 is the de facto standard.
View on AmazonCalcium + D3 Supplement
Daily for growing reptiles, several times per week for adults. Pair with proper UVB — supplements alone don't replace it.
View on AmazonMultiple Hides
Reptiles need cover on both warm and cool sides. Open enclosures cause chronic stress — appetite issues, glass surfing, and refusal to bask.
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Warnings
Extremely delicate skin that tears easily, not a handling pet, fast and flighty, requires planted vivarium setup
