Yellow Cobra Guppy Care Guide - Aquarium Tips, Diet & Breeding

Yellow Cobra Guppies are ornamental guppies recognised for their bright yellow coloration and cobra-like snakeskin patterning, especially across the body and tail. The exact balance of yellow, black and metallic markings varies between individuals and breeding lines, making each fish slightly different.

Like other guppies, they have a laterally compressed body, a fan-shaped tail and an upturned mouth suited to feeding near the water’s surface. Males are especially elaborate, with flowing fins and vivid patterning, while females are larger and more plainly coloured.

These active livebearers spend much of their time exploring the middle and upper areas of the aquarium. They are generally peaceful, though males constantly court females and may display by spreading their fins and making quick, energetic movements.

In the wild, guppies inhabit shallow streams, pools, drainage channels and slow-moving margins, often among vegetation. Their adaptability has helped them become one of the most widely kept freshwater aquarium fish, although selectively bred varieties can be more delicate than wild-type guppies.

The Yellow Cobra Guppy is a selectively bred colour variety of Poecilia reticulata, a species native to northeastern South America, including parts of Venezuela, Guyana, Suriname and northern Brazil. Aquarium-bred strains are now distributed worldwide.

A group of Yellow Cobra Guppies should have at least a 60-litre aquarium, with a footprint of approximately 60 × 30 cm or larger. Use a secure lid, gentle to moderate filtration and open swimming space, balanced with dense plants such as guppy grass, Java moss or floating plants. A dark, fine-grained or smooth gravel substrate helps their colours stand out and will not damage their fins, while natural wood, rocks and planted cover provide additional structure and shelter for fry.

Males typically reach about 3–4 cm (1.2–1.6 in), while females grow larger at up to approximately 5–6 cm (2.0–2.4 in).

Offer a varied omnivorous diet based on a quality small tropical flake or micro-pellet, supplemented with baby brine shrimp, daphnia and other suitably sized frozen or live foods. They also graze on soft algae and biofilm, and occasional blanched vegetables or spirulina-based foods can provide useful plant matter. Feed small portions once or twice daily, ensuring that food is small enough for both adults and younger fish to eat comfortably.

Yellow Cobra Guppies suit peaceful community aquariums with tankmates such as small tetras, rasboras, peaceful corydoras, otocinclus, small peaceful loaches and other compatible livebearers. Avoid fin-nipping species, large predatory fish and boisterous tankmates that may harass their flowing fins. Males and females can be kept together, but females should greatly outnumber males; otherwise, persistent male attention can cause stress.

Yellow Cobra Guppies are easy to breed and will reproduce readily in a suitable community aquarium. They are livebearers, so the female gives birth to free-swimming fry after carrying them for around 21–30 days. Provide dense plants, moss or a breeding shelter where young can hide, as adults may eat newborn fry. A female can produce several dozen fry in one brood, and females should outnumber males to reduce persistent courtship pressure.

Females are noticeably larger and more robust, with shorter, less ornate fins and a subdued body pattern. Males are smaller and more colourful, with an elongated gonopodium, larger flowing fins and stronger yellow-and-cobra patterning.