Green Cobra Guppy: Beginners Care Guide to Tank Setup, Breeding, feeding and More

Green Cobra Guppy, scientifically known as Poecilia reticulata, corbra green guppy, or green king cobra guppy

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Green Cobra Guppy: Beginners Care Guide to Tank Setup, Breeding, feeding and More

The Green Cobra Guppy, scientifically known as Poecilia reticulata, corbra green guppy, or green king cobra guppy, is a stunning freshwater fish species popular among aquarium enthusiasts. In this guide, we’ll explore the various aspects of caring for Green Cobra Guppies, from their origin to tank setup, feeding, diseases, tank mates, breeding, and their affinity for aquatic plants.

Common NamesGreen Cobra Guppy, Cobra Guppy
Scientific NamePoecilia reticulata
Size of the Fish1.5 to 2.5 inches
Difficulty ScoreEasy to Moderate
Minimum Tank Size10-15 gallons
Best Compatible Tank MatesEndler’s Livebearers, Neon Tetras, Platies, Corydoras Catfish
Water Temperature Range75-82°F (24-28°C)
pH Level6.8-7.8
Hardness (dGH)10-20 dGH
DietOmnivorous (Flakes, Pellets, Live/Frozen Foods)
Lifespan2-3 years
BreedingProlific Livebearers
OriginVenezuela, Trinidad, Barbados
Preferred SubstrateFine-gravel or sand
Tank DecorationLive plants, driftwood, rocks, artificial plants
LightingModerate LED lighting with timer
Common DiseasesFin rot, ich, parasites
Suitable TankmatesEndler’s Livebearers, Neon Tetras, Platies, Corydoras Catfish
source: wikipedia

Green Cobra Guppy Origin

Green Cobra Guppies originate from the slow-moving freshwater streams and rivers in northeastern South America, primarily Venezuela, Trinidad, and Barbados. These regions are known for their lush vegetation and warm tropical climate, which greatly influences the fish’s natural habitat.

Green Cobra Guppy Appearance

 Green Cobra Guppy, scientifically known as Poecilia reticulata, corbra green guppy, or green king cobra guppy
© Tropical fish asia

These corba green guppies are known for their striking Green Mosaic appearance, making them a favorite in the world of aquarists.

Body: The Green Cobra Guppy has a slender body with vibrant green coloration, which extends from the head to the caudal fin, giving it the “cobra” name. Males are typically more colorful and boast longer, flowing fins compared to females.

Fins: The males have elongated dorsal and caudal fins, often displaying intricate patterns and colors. In contrast, female Green Cobra Guppies have shorter fins and are generally larger.

Size: Adult Green Cobra Guppies typically reach lengths of 1.5 to 2.5 inches, making them a perfect choice for small to medium-sized aquariums.

 Green Cobra Guppy, scientifically known as Poecilia reticulata, corbra green guppy, or green king cobra guppy
© aquatic arts

Green Cobra Guppy Water Parameters

Maintaining the right water parameters is crucial for the well-being of Green Cobra Guppies. Here are the key parameters to consider:

ParameterIdeal Range
Temperature75-82°F (24-28°C)
pH Level6.8-7.8
Hardness (dGH)10-20 dGH
Ammonia/Nitrite/Nitrate LevelsMinimal/0 ppm/20 ppm

Maintaining stable and suitable water conditions is vital to prevent stress and disease in Green Cobra Guppies. Regular water testing and monitoring are essential to ensure their health.

Green Cobra Guppy Tank Size and Setup

When setting up an aquarium for Green Cobra Guppies, consider the following guidelines:

Tank Size: A minimum tank size of 10-15 gallons is recommended for a small group of guppies. This provides ample space for swimming and reduces territorial disputes.

Filtration: Efficient filtration is essential to maintain water quality. A sponge filter or a hang-on-back filter is ideal, as it provides gentle water movement.

Substrate: Choose a fine-gravel substrate or sand to mimic their natural environment. Live plants can be added to create a lush and attractive habitat.

Decorations: Use driftwood, rocks, and artificial or live plants for hiding spots and to create a stimulating environment for the guppies.

Lighting: Green Cobra Guppies thrive with moderate lighting. Consider using LED lights with a timer for a consistent day-night cycle.

Green Cobra Guppy Feeding

Proper nutrition is vital for the health and coloration of Green Cobra Guppies. They are omnivores and have a diverse diet. Here’s what to keep in mind:

Commercial Flakes/Pellets: High-quality guppy-specific commercial flakes or pellets should be the primary part of their diet. Look for options that offer a balanced blend of protein and plant matter.

Live and Frozen Foods: Guppies relish live and frozen foods like daphnia, brine shrimp, and bloodworms. These can be given as occasional treats to enhance their diet.

Frequency: Feed your Green Cobra Guppies 2-3 times a day, but in small portions. This helps prevent overfeeding and keeps the water quality stable.

Green Cobra Guppy Diseases, Treatment, and Prevention

Green Cobra Guppies are generally hardy, but like all fish, they can be susceptible to diseases. Common issues include fin rot, ich, and parasites. Here’s how to address and prevent them:

Quarantine New Fish: Always quarantine new fish for a few weeks before introducing them to your established tank to prevent the spread of diseases.

Observation: Regularly observe your guppies for any signs of illness, such as changes in behavior, appetite, or physical appearance.

Treatment: If you notice any health issues, consult a vet or an experienced aquarist for proper diagnosis and treatment. Medications like antibiotics may be necessary.

Clean Water: Maintaining excellent water quality is crucial in preventing diseases. Ensure the tank is cycled, and regular water changes are conducted.

Green Cobra Guppy Tank Mates

Choosing suitable tank mates is essential to prevent aggression and stress among your Green Cobra Guppies. Here are some compatible options:

Compatible Tank MatesIncompatible Tank Mates
Endler’s LivebearersAggressive Fish (e.g., Cichlids)
Neon TetrasLarge Fin-Nipping Fish
PlatiesAggressive Guppy Variants
Corydoras CatfishBetta Fish (Males)

Remember that even peaceful fish can display territorial behavior, so keep an eye on interactions and be prepared to separate individuals if needed.

Green Cobra Guppy Breeding

Guppies are renowned for their prolific breeding. Here’s how to successfully breed Green Cobra Guppies:

Male to Female Ratio: To prevent undue stress on females, maintain a ratio of two or more females for every male. Males tend to pester females during mating.

Breeding Tank: A separate breeding tank is often used to protect fry from being eaten by adult fish. This tank should have gentle filtration and an abundance of hiding places.

Fry Care: Once the female gives birth, transfer the fry to the breeding tank. Feed them with powdered or crushed flake food and gradually introduce newly hatched brine shrimp.

Selective Breeding: If you wish to enhance specific color traits, you can selectively breed guppies by choosing parents with the desired characteristics.

Green Cobra Guppy Plants

Green Cobra Guppies thrive in aquariums with live plants. Here are some options to consider:

Java Moss: This hardy plant provides hiding places for fry and can be easily attached to driftwood or rocks.

Anacharis: Anacharis helps maintain water quality and provides a food source for young guppies, as they can graze on small organisms that grow on the plant.

Hornwort: Fast-growing and low-maintenance, Hornwort offers excellent cover for fry and helps to reduce nitrates in the water.

Incorporating live plants not only enhances the aesthetics of the aquarium but also contributes to a healthy and well-balanced ecosystem.


Green Cobra Guppies are captivating and relatively easy to care for, making them an excellent choice for both beginner and experienced aquarists. By following the guidelines for origin, appearance, water parameters, tank setup, feeding, disease prevention and treatment, selecting suitable tank mates, breeding, and incorporating aquatic plants, you can create a thriving and visually stunning aquarium that your Green Cobra Guppies will love to call home. Happy fish keeping!

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Lee Johnson

Lee Johnson

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I love sharing my knowledge about all things aquarium related. I have been keeping aquariums for over 20 years and cannot imagine a life without an aquarium. 

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