Corn Snake Morph Guide

Multi-allele locus controlling melanin production. Two confirmed alleles: Amelanistic (Amel/Albino): Removes all melanin. Background color becomes bright orange/red with white or cream saddle marks and red/orange eyes (no dark pigment). The classic "albino" corn snake. First produced in captivity in 1961 by Dr. Bernard Bechtel. One of the foundational mutations in the hobby. Ultra: A distinct allele at the same locus. Produces a reduced-melanin phenotype: animals have muted, pastel coloration (less intense than normal but not fully amelanistic). Eyes appear lighter than wild-type. Subtle reduction of dark pigment. Homozygous Ultra looks similar to but is distinguishable from Amel. Ultramel: Compound heterozygous (one Amel allele + one Ultra allele). Produces a phenotype intermediate between Amel and normal: reduced melanin, pastel/washed-out coloration, lighter eyes. Visually distinct from both homozygous forms. Ultramel is proven by complementation: Amel x Ultra produces visual Ultramel offspring, not wild-type, confirming allelism.

Removes all red, orange, and yellow pigment (erythrin pigments). Animals display black, gray, and white coloration with no warm tones. Background becomes silvery-gray; saddle marks remain dark brown to black. Eyes are dark/black (not red. Melanin is retained). Often called "Black Albino" informally, though this is a misnomer since melanin is fully present. Independent locus from Anerythristic Type B (Charcoal). Complementation confirms: Anery A x Charcoal produces wild-type-looking double het offspring, proving they are at different loci. Hatchlings from Anery A are often gray and white, becoming more silver/gray as they mature.

Removes red, orange, and yellow pigment. Similar to Anerythristic Type A in overall effect. But produces a slightly different phenotype with darker, more charcoal-toned animals. Melanin is retained. Background appears darker gray or charcoal compared to the silvery-gray of Anery A; saddle marks tend to be very dark brown or black. INDEPENDENT locus from Anerythristic Type A. Confirmed by complementation: Charcoal x Anery A crosses produce normal-appearing double het offspring (not visual anerythristic), proving the two mutations are at different genes. This distinction is critical for breeding calculations. Breeders who cross Anery A and Charcoal stock need to track both loci separately. The Charcoal mutation participates in several combo morphs including Pewter (Charcoal + Diffused) and Blizzard (Charcoal + Diffused + Amel).

Produces a buff, tan, or pale brown coloration. The mutation shifts the typical orange-red background toward muted tan/buff tones. Dark pigment is retained. The overall effect is a more muted, sandy-brown animal compared to wild-type. The name "Buf" comes from "buff," describing the tan-cream color. When combined with other loci, Buf can contribute to various earth-toned phenotypes.

Shifts the pigmentation toward warm yellow-caramel tones. Red pigment is replaced by yellow-amber or caramel coloration. Dark pigment (melanin) is retained but may appear brownish rather than black. Background shifts from the typical orange-red of wild-type toward golden-yellow and caramel. Saddle marks typically appear brown. When combined with Amelanistic, produces the Butter morph (Amel + Caramel): a warm yellow animal with no dark pigment, often cream/yellow with very soft pattern elements.

Modifies both pattern and pigment distribution. Heterozygous expression (Diffused): belly pattern (checkered marks) is reduced or absent; lateral pattern on the sides of the body becomes more diffuse/faded. The dorsal saddle pattern is maintained but lateral blotches fade. Homozygous expression (Bloodred): dramatic and unique phenotype. The belly is completely clean/unpatternned (no checkers). The dorsal saddle pattern is heavily diffused or nearly absent, leaving a mostly solid deep orange-red animal. Adults may appear nearly uniform deep red-orange with faint dorsal pattern remnants. Hatchlings show more pattern that fades with age; breeders call this "growing into color." Rick Staub of Constrictors Unlimited is credited with developing and documenting the Bloodred line. The Diffused gene also participates in Pewter (Charcoal + Diffused) and Blizzard (Charcoal + Diffused + Amel).

Reduces melanin expression without eliminating it. Animals display brighter, more vivid coloration: orange-red background is more intense/cleaner, dark pattern elements (saddle outlines, belly checks) are reduced or lightened, and the overall appearance is "cleaner" and brighter than wild-type. Hypomelanistic corn snakes retain some dark pigment but it is visibly reduced. Saddle outlines appear brownish rather than dark gray-black. The belly checkered pattern is reduced or absent in the center rows. DISTINCT from Sunkissed (Sunk locus), which produces a similar hypo-like appearance but is a separate independent locus. Hypo x Sunkissed cross produces wild-type-looking double het offspring (not visual hypos), confirming independence. Some older literature conflates the two. Participates in the Ghost combo morph (Hypo + Anery A) and Amber (Hypo + Caramel).

Produces rich chestnut-brown coloration replacing the typical orange-red background. The name comes from the German word for "chestnut." Background color shifts to warm, deep chestnut-brown tones. Saddle marks typically appear a darker chocolate-brown. The overall impression is a warm, earth-toned animal. Distinct from Caramel (warmer/yellower) and wild-type. Independent locus confirmed through test breeding records.

Removes red and yellow pigment and replaces them with lavender, pink-gray, and silver-purple tones. One of the most visually striking corn snake mutations. Background color becomes silver-gray with lavender/pink undertones; saddle marks are lavender to pink-purple with dark outlines that may fade with age. Eyes are typically dark but may appear slightly lighter. Animals tend to lighten and become more lavender as they age. Hatchlings may appear quite dark gray with pink tones that develop more clearly over the first year. When combined with Amelanistic, produces Opal (Amel + Lavender): a pink-white to pearl-white animal with very soft lavender or pink saddle marks and red/pink eyes. Highly sought after in the hobby.

Produces intense, deep red-orange to lava-orange coloration with greatly reduced dark pigment. Similar to Hypomelanistic in reducing melanin, but the Lava mutation produces a more extreme reduction and a distinctly deeper, more saturated red-orange tone. The name reflects the vivid, molten-orange appearance of homozygous Lava animals. Dark pattern elements (saddle outlines, belly checks) are very faint or absent. Background color is a rich, intense orange-red. When combined with other color morphs, Lava produces highly saturated, vivid animals.

Multi-allele locus with two confirmed alleles affecting dorsal pattern: Motley (Mot allele): Homozygous Motley replaces the typical oval/rectangular saddle marks with a connected, chain-link or circular pattern. The saddles are modified into open rings, circles, or connected blotches running down the dorsum. Pattern varies by individual; some show circular openings in saddles, others show an irregular connected chain pattern. Lateral blotches are reduced or absent. Stripe (Str allele at Mot locus): Homozygous Stripe produces a continuous dorsal stripe pattern. The saddle marks are replaced by one to four longitudinal stripes running the length of the body. Lateral blotches absent. Clean, linear pattern. Compound heterozygous (Motley allele + Stripe allele): Both alleles are ALLELIC at the same locus, confirmed by complementation testing by multiple independent breeders (Jeff Mohr, Joe Fauci, Mike Klaas, and others). Motley x Stripe crosses never produce wild-type offspring; instead, compound hets display a variable phenotype, often a stripe or motley pattern, not wild-type. This confirms allelism. IMPORTANT for breeding calculations: Motley/Stripe compound hets are visually expressing (not wild-type carriers). A Motley breeder using Stripe stock (or vice versa) must treat both as alleles at the same locus.

Dominant mutation producing a leucistic-like phenotype with scattered colored scales. One of the most visually dramatic corn snake mutations. Heterozygous Palmetto (one copy): Produces a white or near-white animal with scattered single colored scales distributed randomly across the body. The colored scales may be orange, red, gray, or patterned, and their distribution is unique to each individual. No two Palmetto corn snakes look exactly alike. The random colored scales on a white background give a confetti-like appearance. Homozygous Super Palmetto (two copies): Produces a near-complete to complete leucistic animal, pure white with minimal or no colored scales. Super Palmettos are almost entirely white, lacking even the scattered scales of the het form. This phenotype is more extreme than the het form, confirming incomplete dominance. NOTE: Palmetto is NOT the same as a true leucistic mutation (which would be recessive and produce all-white animals without any scattered scales in the het form). One copy of Palmetto always produces the characteristic scattered-scale phenotype. Discovery search demand: "corn snake palmetto" averages ~2,900/mo.

Enhances red and pink pigment expression, producing a vivid strawberry-red to pink-red coloration. The background color is shifted toward a warmer, pinker-red than typical wild-type orange-red. Saddle marks may appear reduced in contrast. Overall, the animal has a distinctly pinker, more saturated red appearance. When combined with Amel, produces animals with very pink/red-tinged amelanistic phenotypes. The Strawberry mutation is valued for adding warmth and intensity to red tones.

Produces a hypo-like phenotype similar to Hypomelanistic but at an INDEPENDENT locus. Animals display reduced dark pigment, brighter base coloration, and reduced belly checkers. Appearances very similar to Hypo. CRITICAL: Sunkissed is NOT allelic with Hypomelanistic. Complementation test: Hypo x Sunkissed produces double het offspring that appear WILD-TYPE (not visual hypos), proving independence. This means: - Hypo + Sunkissed carriers (double het animals) appear normal and show no visual hypo characteristics - A calculator must track both as separate loci - Some older sources and vendors incorrectly label Sunkissed animals as "Hypo"; verify provenance when purchasing het animals Some breeders describe subtle visual differences between Hypo and Sunkissed homozygous animals (Sunkissed may show slightly brighter orange or cleaner saddles), but reliable visual ID is not consistent enough to replace test breeding.

Dominant pattern mutation producing a modified dorsal pattern distinct from the typical saddle marks. Heterozygous Tessera (one copy): Produces a tessellated/tile-like pattern. The normal saddle marks are modified into a series of smaller, more geometric scale-outlined marks running down the dorsum, creating a "tessera" or tile-like appearance. The lateral pattern is also modified. Animals also tend to show a partial dorsal stripe or broken stripe element. Homozygous Super Tessera (two copies): Produces a cleaner, more defined version of the Tessera pattern, often described as a continuous dorsal stripe or very clean geometric pattern with minimal lateral blotching. The super form is visually distinct from the het form, confirming incomplete dominance. Note: Some breeders describe het Tessera and super Tessera as similar enough to question whether this should be classified as simple dominant rather than incomplete dominant.