Initial Observations from a Hula × Cappuccino Breeding Project in Correlophus ciliatus

Marissa Marcinelli
Hollywood Hills Exotics LLC

July 29, 2026

The Hula phenotype has garnered considerable interest within the crested gecko community in recent years since its introduction. Phenotypically, Hulas exhibit a distinctive appearance, expressing an organized cream dorsal pattern, extensive white pigmentation, cool-toned cranial coloration, and a high degree of overall contrast. The trait has also attracted considerable interest because of its apparent relationship with the Cappuccino complex. While individual Hula animals exhibit some phenotypic variation, the overall appearance has remained sufficiently consistent that breeders have recognized it as a distinct phenotype. Despite this, the underlying genetic relationship between Hula and other members of the Cappuccino complex has remained merely speculative.

The Hula lineage traces back to a single founding animal that was acquired by DJ ("The Gecko Don"). The original Hula was subsequently bred to a phenotypically normal crested gecko, establishing the Hula lineage through successive generations. Hollywood, the female utilized in the present study, is a direct offspring of that original Hula and therefore represents the second documented generation of the lineage. The offspring described here extend that pedigree into a third generation while providing an opportunity to prospectively evaluate the inheritance of the Hula phenotype through a controlled breeding project.

Since its introduction to the hobby, discussion has largely centered on its relationship to Cappuccino and the Cappuccino complex. Because the two phenotypes share several visual characteristics, many breeders proposed that Hula simply represented Cappuccino expressed with variable phenotypic intensity or influenced by unidentified modifier genes. Others suggested that Hula might instead be closely related to Sable. A third hypothesis, however, proposed that Hula represented a distinct allele within the broader Cappuccino complex rather than an entirely separate mutation. Under this interpretation, Hula, Cappuccino, Sable, and other related phenotypes would represent different alleles occupying the same genetic locus, similar to other recognized allelic series observed in reptile genetics.

Although each hypothesis accounted for portions of the observed phenotype, none had been evaluated through a prospectively documented pairing within the Cappuccino complex and conclusions have remained speculative. Furthermore, reports from breeders suggested that Hula appeared to inherit as a distinct heterozygous trait, an observation that was difficult to reconcile if Hula simply represented variable expression of the same heterozygous Cappuccino genotype. These competing explanations provided the rationale for the present Hula × Cappuccino breeding project. Rather than attempting to prove a particular genetic model, the objective was to generate meticulously documented observations that could be evaluated as additional offspring were produced.

Hollywood (Hula)

Coalossal (Cappuccino)

Hollywood, the female Hula, was paired to Coalossal, a Cappuccino male, and every offspring was documented using standardized photography and written observations beginning on the date of hatch. Importantly, phenotypic designations were based on observed characteristics rather than predetermined expectations, allowing the project to remain prospective rather than retrospective.

The first hatchling, CoHo2601, displayed the organized cream dorsal pattern, cool-toned head coloration, and overall appearance consistent with the Hula phenotype. Shortly thereafter, CoHo2602 hatched and exhibited warmer cranial pigmentation, fragmented dorsal cream, and the more complex lateral patterning characteristic of Cappuccino. The recovery of both parental phenotypes from the same pairing established reference animals against which subsequent hatchlings could be compared.

CoHo2601 (Hula)

CoHo2602 (Cappuccino)

The third hatchling, CoHo2603, differed from both reference animals. Rather than conforming to either the Hula or Cappuccino phenotype, the animal exhibited a phenotype distinguishable from both Hula and Cappuccino reference animals produced by the same pairing. At hatch, the animal displayed markedly increased melanization throughout the entire animal, resulting in a substantially darker overall appearance than either parental phenotype. The animal displayed distinct white markings evident on the head, distal portions of the limbs, and feet, along with sharply defined banding on the tail. In the days since hatch, the white coloration of the head, feet, and tail has increased. Because these observations were documented prospectively from the day of hatching, CoHo2603 is interpreted here as a Hula/Cappuccino compound heterozygote. The fourth hatchling, CoHo2604, subsequently developed a phenotype consistent with Cappuccino, providing a second Cappuccino reference animal within the same breeding project and further emphasizing the distinction between CoHo2603 and conventional Cappuccino or Hula offspring.

CoHo2603 (Hula/Cappuccino compound heterozygote) 

CoHo2604 (Cappuccino)

Although the number of animals documented remains small, the breeding outcomes are informative when considered in the context of the competing genetic hypotheses. To date, the pairing has produced offspring phenotypically consistent with Hula, offspring consistent with Cappuccino, and an additional phenotype distinct from either parental morph. These observations are more readily explained by an allelic relationship between Hula and Cappuccino than by simple variable expression of a single mutation, although additional breeding outcomes will be required before definitive conclusions can be drawn. At present, the interpretation that Hula represents a distinct allele within the Cappuccino complex should be regarded as a working hypothesis supported by preliminary observations rather than an established genetic fact.

If this interpretation ultimately proves correct, the implications extend beyond the present breeding project. The existence of a putative Hula/Cappuccino compound heterozygote suggests that additional genotypic combinations within the Cappuccino complex may produce their own recognizable phenotypes. It also raises the possibility that a homozygous Hula genotype, informally referred to as a "Super Hula," would represent a phenotype distinct from other documented compound or homozygous combinations within the Cappuccino complex, including Highway/Cappuccino, Luwak-associated combinations, and Super Sable. At present, these possibilities remain predictions derived from the proposed allelic model and should not be interpreted as conclusions. Continued breeding, longitudinal documentation, and evaluation across future generations will ultimately determine whether these preliminary observations accurately describe the genetic relationship between Hula and the Cappuccino complex.

The purpose of this report is therefore not to provide a definitive answer, but to establish a prospective, evidence-based record of the earliest generations of the Hula lineage. As additional offspring are produced and existing animals mature, these observations can be refined, challenged, or expanded. By documenting the project from its inception rather than reconstructing it retrospectively, it is hoped that the resulting record will contribute to a more rigorous understanding of one of the most intriguing emerging phenotypes in Correlophus ciliatus.

CoHo2603 on July 29, 2026 (3 days old).