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

Cobra Endler Guppies are a striking cultivated form of the small livebearing fish Poecilia wingei. Males display a vivid cobra-like reticulated or chain pattern across the body, often combined with orange, yellow, red, green and blue markings. Their compact bodies and energetic swimming make the strain especially eye-catching in a planted aquarium.

Like other Endler Guppies, males are constantly active and frequently court females, displaying their colours and positioning themselves alongside potential mates. They are generally peaceful, but their persistent breeding behaviour can become stressful for females when too few females are present.

In the wild, Poecilia wingei inhabits warm, usually slow-moving waters with vegetation, submerged roots and variable mineral content. The species is closely related to the Common Guppy, Poecilia reticulata, and the two can interbreed readily. Many fish sold as Cobra Endlers are selectively bred aquarium strains rather than direct wild forms.

Cobra Endler Guppies are social, adaptable and suitable for peaceful community aquariums. Their small size and lively personality make them a popular choice for planted nano and small tropical displays, while their rapid reproduction can produce a growing colony over time.

The Cobra Endler Guppy is a selectively bred colour strain of Poecilia wingei, a species native to northeastern Venezuela in South America. Wild Endler populations are associated with coastal freshwater habitats around the Cumaná area, including Laguna de los Patos and nearby lagoons, pools and streams.

A group of Cobra Endler Guppies should be kept in an aquarium of at least 40 litres, with a footprint around 60 × 30 cm providing a practical minimum for active swimming and population growth. Use a secure cover because they may jump, along with gentle to moderate filtration and good water movement without creating excessive turbulence. Fine gravel or sand works well, while dense planting, Java moss, floating plants, wood and small stones provide shelter and visual cover. Leave open swimming space at the front and maintain stable, clean, well-oxygenated water at about 22–28°C with a pH of approximately 6.5–8.0.

Males reach about 2.5 cm (1 inch), while females can grow to approximately 4.5 cm (1.8 inches). Selectively bred aquarium specimens may vary slightly in size.

Offer a varied omnivorous diet based on good-quality small flake or micro-pellet food, supplemented with baby brine shrimp, daphnia, mosquito larvae and other suitably sized frozen or live foods. Spirulina-based foods and blanched vegetables can provide useful plant matter. Feed small portions once or twice daily, ensuring that food is fine enough for their small mouths and that excess is not left in the aquarium.

Cobra Endler Guppies suit peaceful tankmates of a similar size, including small rasboras, ember tetras, small peaceful tetras, pygmy Corydoras, Otocinclus and other gentle livebearers. Avoid fin-nipping species, large or predatory fish, and boisterous tankmates that may eat adults or fry. They should not be housed with Common Guppies if maintaining a pure Endler strain is important, because the two species hybridise readily.

Cobra Endler Guppies are prolific livebearers and breed readily in a suitable aquarium. Maintain a ratio of one male to two or three females to reduce persistent male attention. Females give birth to free-swimming fry roughly every 24–30 days after mating, often producing around 10–40 young depending on their size and age. Dense plants such as Java moss or floating cover help fry survive, although adults may eat them. Separate the fry if a high survival rate is desired and feed them finely crushed flakes, powdered fry food or newly hatched baby brine shrimp.

Males are much smaller and more vividly coloured, with an elongated gonopodium and a patterned, often brightly marked tail and body. Females are larger, rounder and comparatively plain silver, grey or olive, with a dark gravid spot becoming visible near the rear of the abdomen when carrying developing young.