Blue Cobra Male Guppy 3.5cm – Poecilia reticulata

The Blue Cobra Male Guppy is a colourful fancy guppy known for its metallic blue tones and distinctive cobra or snakeskin-style body markings.

At approximately 3.5cm, these are young male guppies that may continue to develop stronger colour and more defined patterning as they mature.

Individual Blue Cobra males naturally vary. Some may show stronger blue through the body and tail, while others display silver, turquoise, black or greenish metallic tones alongside the characteristic reticulated cobra pattern.

Quick Care Guide

• Scientific Name: Poecilia reticulata
• Common Name: Blue Cobra Male Guppy
• Sale Size: Approximately 3.5cm
• Adult Male Size: Approximately 4–5cm
• Temperament: Peaceful
• Temperature: 22–28°C
• pH: 7.0–8.2
• Water Hardness: Approximately 8–20 dGH
• Preferred Water: Moderately hard to hard, neutral to alkaline
• Diet: Omnivore
• Care Level: Easy
• Breeding: Livebearer
• Sex: Male
• Origin: Captive-bred strain of Poecilia reticulata

What Does Blue Cobra Mean?

Blue Cobra describes the combination of blue colouration with the fine, reticulated or snakeskin-style markings found across the body of this selectively bred guppy strain.

Individual males may display different amounts of:

• metallic blue
• turquoise or green-blue iridescence
• silver body colour
• dark cobra-pattern markings
• blue and black tail markings
• patterned dorsal fins

Because these are live fish, colour and pattern naturally vary between individuals. Product photos should be considered representative of the strain rather than an exact guarantee of the fish supplied.

Aquarium Setup

Blue Cobra Male Guppies are active community fish that do well in aquariums with open swimming space, live plants and areas of cover.

A suitable setup can include:

• live aquarium plants
• floating plants
• open swimming areas
• gentle to moderate filtration
• good oxygenation
• a secure aquarium lid

Avoid very strong water flow, particularly with fancy males carrying larger tails and fins.

Browse our Live Aquarium Plants range if you are creating a planted guppy aquarium.

Water Conditions

Guppies are adaptable, but they generally perform best in moderately hard to hard water rather than very soft, acidic conditions.

For long-term aquarium care, aim for approximately:

• Temperature: 22–28°C
• pH: 7.0–8.2
• General Hardness: 8–20 dGH

Stable water quality is more important than continually adjusting the aquarium to reach one exact number.

The aquarium should be fully cycled, with ammonia and nitrite maintained at zero and regular partial water changes used to control accumulated waste.

Male-Only Guppy Groups

Male guppies do not need females to remain healthy or display their colour.

A male-only aquarium is a practical way to keep several colourful guppy strains without continually producing fry.

Males may occasionally display and chase one another, but serious aggression is uncommon where sufficient space and cover are provided.

Keeping Males & Females Together

If male and female guppies are kept together, breeding should be expected.

A useful starting ratio is approximately one male to two or three females. This helps spread persistent courtship behaviour between several females.

Female guppies can store sperm and may produce multiple broods after mating, so guppy populations can increase quickly.

Tank Mates

Blue Cobra Male Guppies are peaceful community fish and can be kept with many similarly sized species that prefer comparable water conditions.

Potential companions include:

• other Guppies
• Platys
• selected Mollies
• Corydoras
• peaceful Rainbowfish
• other calm community species suited to moderately hard water

Avoid aggressive fish and known fin nippers that may damage their flowing fins.

Browse our Guppies range for other colours and strains.

Feeding Blue Cobra Guppies

Guppies are omnivorous and benefit from a varied diet.

A good feeding routine can include:

• quality tropical flakes
• small guppy pellets or granules
• brine shrimp
• daphnia
• small frozen or live foods
• foods containing plant and algae ingredients

Feed small portions that can be consumed quickly rather than allowing excess food to accumulate in the aquarium.

Are Blue Cobra Guppies Suitable for Beginners?

Yes. Blue Cobra Guppies are generally suitable for beginner fishkeepers when their basic requirements are met.

The most important points are maintaining a fully cycled aquarium, providing clean moderately hard water, choosing peaceful tank mates and offering a varied diet.

Arrive Alive Guarantee

We carefully pack our live fish for transport and back eligible orders with our Arrive Alive Guarantee.

If a fish arrives deceased, please contact us within 2 hours of delivery with your order details and clear photos of the affected fish. Once the claim has been verified, an applicable refund or store credit will be provided for the affected fish.

For full claim requirements, shipping conditions and exclusions, please read our Arrive Alive Guarantee & DOA Policy.

Frequently Asked Questions

How big do Blue Cobra Male Guppies grow?

Adult males generally reach around 4–5cm. The fish offered here are approximately 3.5cm at the time of sale.

What does Cobra mean in a guppy?

Cobra refers to the fine reticulated or snakeskin-style markings that appear across the body and sometimes the fins of selectively bred guppies.

Are all Blue Cobra Guppies identical?

No. Blue, turquoise, silver, greenish and dark markings can vary considerably between individual males.

Do male guppies need females?

No. Male guppies can be successfully kept without females, and male-only groups are a practical way to avoid unwanted breeding.

What water is best for Blue Cobra Guppies?

They generally do best in moderately hard to hard water with a pH around 7.0–8.2 and a temperature of approximately 22–28°C.

Are Blue Cobra Guppies peaceful?

Yes. They are peaceful community fish, although males may occasionally chase and display toward one another.

Can Blue Cobra Guppies live with Bettas?

This combination can be risky because Bettas may react aggressively toward brightly coloured, long-finned guppies and fin damage can occur.

Are Blue Cobra Guppies suitable for beginners?

Yes. They are suitable for beginners provided the aquarium is fully cycled and maintained with clean, stable, moderately hard water.

Live fish naturally vary in colour, pattern, fin shape and size. The stated 3.5cm sale size is approximate and product photos should be considered representative of the strain.