Koi Tuxedo Guppy Care Guide - Aquarium Setup, Diet & Breeding

Koi Tuxedo Guppies combine a bright red, orange or yellow head and anterior body with a contrasting darker tuxedo pattern toward the rear. Selective breeding has produced considerable variation in tail shape, colour intensity and pattern definition, with some males displaying broad, flowing fins and vivid mosaic markings.

Males are small, colourful and constantly active, often displaying their fins while courting females. Females are larger and more plainly marked, although koi-patterned females can show attractive patches of colour and may develop a gravid spot when carrying fry.

Like other guppies, this variety is a livebearer rather than an egg-layer. Females retain fertilised eggs internally and release free-swimming young, and they can store sperm from a previous mating for later broods.

Wild guppies inhabit a wide range of shallow freshwater environments, including streams, pools, ditches and sluggish margins with vegetation. The domestic Koi Tuxedo form is bred for ornamental aquariums and does not occur as a naturally established colour morph in the wild.

Koi Tuxedo Guppies are a selectively bred domestic colour variety of Poecilia reticulata, the guppy. The species originates from northern South America and nearby Caribbean islands, including Venezuela, Guyana, Suriname, northern Brazil and Trinidad.

A small group of Koi Tuxedo Guppies should have an aquarium of at least 40 litres, with a footprint of approximately 60 × 30 cm preferred over a tall, narrow tank. Use gentle to moderate filtration, open swimming space and plenty of fine-leaved plants, floating cover and other calm refuges for females and fry. A dark, smooth substrate helps their colours stand out, while a secure lid is advisable because guppies can jump. Maintain stable, clean freshwater with good oxygenation and moderate flow.

Males reach about 3 cm (1.2 in), while females can grow to approximately 5–6 cm (2.0–2.4 in). Selectively bred strains may vary slightly in overall body and fin size.

Koi Tuxedo Guppies are omnivores and do best with a varied diet of quality flake or small granular foods supplemented with baby brine shrimp, daphnia, mosquito larvae and other appropriately sized frozen or live foods. Spirulina-based foods and finely softened vegetables can provide useful plant matter. Offer small portions regularly, taking care not to overfeed, and give fry appropriately tiny foods such as powdered flakes or newly hatched brine shrimp.

Koi Tuxedo Guppies suit peaceful community aquariums with similarly sized, non-aggressive fish. Suitable companions include small tetras, rasboras, Corydoras, peaceful small livebearers, white cloud mountain minnows and gentle bristlenose catfish, provided their temperature needs are compatible. Avoid fin-nipping species such as tiger barbs, aggressive cichlids, larger predatory fish and boisterous tankmates that may harass males or eat fry. Keeping more females than males helps reduce persistent courtship pressure.

Koi Tuxedo Guppies are prolific livebearers and will usually breed without intervention when both sexes are present. The female gives birth to fully formed fry after a gestation of roughly 21–30 days. Dense plants or a separate breeding setup give the young places to hide, as adults may eat them. Feed the fry powdered flakes, baby brine shrimp or other suitably tiny foods, and separate them by size if necessary as they grow.

Females are noticeably larger and deeper-bodied than males, while males are slimmer and much more intensely coloured, often with larger ornamental tails. Males possess a narrow gonopodium, the modified anal fin used for mating; females have a conventional fan-shaped anal fin and may show a dark gravid spot when carrying developing fry.