Official classes
The 2023 IKGH standard recognizes 13 standardized tail shapes: fan, triangle/delta, veil, flag, halfmoon, double sword, top sword, bottom sword, lyre, spade, spear, round and needle/pin. Dumbo, swallow, ribbon and other supplementary fin traits are not interchangeable with these tail classes.
Basic pigmentation categories
IKGH describes grey, gold, blond, blue, pink, albino, white, silver, cream and lutino base colors. These base-color labels differ from visually blue or white commercial crosses such as Blue Moscow or platinum variants. RREA and WREA should be catalogued distinctly.
Inheritance cautions
Sex-linked inheritance is important but not sufficient to explain every guppy ornamental pattern: a 2022 genomic study found autosomal associations in a male coloration system. Catalog individual crosses, father/mother, sex, offspring ratios, locus evidence, and generation, rather than guessing dominant/recessive or Y-linked from the name.
Genealogy visual status
Parent lines not documented for the commercial labels in this catalog. Do not create invented gene trees; attach image-style pedigrees with solid edges for documented parentage and dashed edges for explicitly reported/unverified crosses when breeder records become available.