Cappuccino Crested Gecko: Why Super Cappuccinos Are Risky
Cappuccino is incomplete dominant, not codominant. Super Cappuccinos (CAPP/CAPP) have documented breathing issues, here is what every breeder needs to know before pairing.
The Cappuccino crested gecko is one of the most popular incomplete dominant traits introduced to the hobby in the last decade. It was discovered and proven by Reptile City Korea in 2020-2021 and has since become a staple of high-end Correlophus ciliatus breeding projects worldwide. But the trait carries health risks in homozygous form that newer breeders often miss because the hobby still calls it "codominant", a term that is almost always wrong when applied to crested geckos.
This guide covers what Cappuccino actually is genetically, how to identify a heterozygous Cappuccino at a glance, why Super Cappuccinos should not be the goal of a pairing, and how the trait interacts with Sable and Highway, which are thought to be other versions of the same gene.
Cappuccino is incomplete dominant, NOT codominant. The distinction matters because incomplete dominant traits produce a distinct intermediate "super" form when homozygous, while codominant traits express both alleles independently and visibly. Most crested gecko traits historically labeled codominant in hobby literature are actually incomplete dominant, and the Foundation Genetics project led by Lil Monsters Reptiles has reclassified them as such.
Published 2026-04-18. Updated 2026-10-16.
TL;DR
- Cappuccino is incomplete dominant, one copy gives the visible trait, two copies produce the Super Cappuccino (Melanistic).
- Super Cappuccinos have documented health issues including reduced nostril size and breathing difficulty. Breeding for supers is not recommended.
- Sable is widely reported to be a second version of the Cappuccino gene, so Cappuccino x Sable gives Luwak rather than a super. Highway is placed on the same gene provisionally; that is not settled.
- Hobby sources commonly call Cappuccino "codominant." This is incorrect, true codominance is extremely rare in any animal species.
Frequently asked questions
Is Cappuccino codominant or incomplete dominant?
Cappuccino is incomplete dominant, not codominant, a common hobby error corrected by the Foundation Genetics project. Two copies produce the Super Cappuccino (Melanistic) form, which is the diagnostic signature of incomplete dominance.
Can I safely breed Super Cappuccinos?
Super Cappuccinos (homozygous CAPP/CAPP) have documented health concerns including reduced nostril size and breathing difficulties. Breeding specifically for Supers is not recommended. Pair Cappuccino × non-Cappuccino instead, which produces approximately 50% Cappuccino offspring without producing Supers.
What is the difference between Cappuccino and Sable?
Cappuccino and Sable are both incomplete dominant traits that sit at the same gene locus (allelic), but they are distinct alleles. Cappuccino × Sable produces a compound heterozygote called Luwak, NOT a Super Cappuccino, which is the key evidence proving they share a locus.
How do I identify a heterozygous Cappuccino?
Look for a Y-shape at the base of the tail, white flecks or splotching along the lower spine, reduced lateral pattern, and bright sharp white on the tail base in hatchlings with a darker tail tip.
What is a Frappuccino crested gecko?
A Frappuccino is a Cappuccino combined with the Lilly White trait (Cappuccino + Lilly White). Frappuccinos hatch with brighter, whiter coloration than a standard Lilly White and develop dramatic white spotting on the head as they mature.
When was Cappuccino discovered?
Cappuccino was discovered and proven by Reptile City Korea in 2020-2021. The trait has since been adopted by major US, EU, and Asian breeders and is now one of the most widely worked incomplete dominant traits in the hobby.
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