Male Cobra Mix Guppy (Poecilia reticulata)

Choose an assorted male guppy with natural pattern variation

The Male Cobra Mix Guppy is an assorted male form of Poecilia reticulata, a livebearing fish in the family Poeciliidae. FishBase records its native range across Venezuela, Barbados, Trinidad, northern Brazil and the Guianas, and a maximum of 5 cm standard length for male or unsexed fish. It suits a prepared beginner who can provide a mature, filtered aquarium at least 60 cm long, stable mineral-bearing water and a carefully planned social group.

Cobra is a trade description for the reticulated, spotted or snake-like pattern direction seen across the body and fins; it is not a separate species or a promise of one named pedigree. Mixed colours and differences in marking density are part of this offer. Plan routine care around 22–28°C, pH 7.0–8.0 and 9–18 dGH, with five or more guppies where aquarium capacity, filtration, sex planning and other livestock allow.

One purchase supplies one animal in the recorded 3–3.5 cm dispatch grade. That measurement describes the fish supplied rather than its finished adult length. Purchasing several fish adds individual males; it does not create a pair, trio or balanced mixed-sex group.

Sex is guaranteed only when the exact product or selected option explicitly states male or female. This Male Cobra Mix Guppy listing is sold as male.

The gallery images are representative of this type of animal rather than photographs of the exact animal supplied, so colours can look slightly different from the live animal. The scene shows three patterned guppies, but the number visible in an image does not change the one-animal purchase unit.

Use the livebearers collection to compare other livebearer identities and forms. For this assortment, make the buying decision on the male sex, cobra-pattern direction, dispatch grade and care needs rather than expecting an exact match to one photographed fish.

Plan the aquarium around the recorded adult length

Eschmeyer’s Catalog of Fishes accepts Poecilia reticulata, and the species belongs to the family Poeciliidae. The cobra wording describes the selected aquarium appearance, while the scientific identity remains the ordinary guppy.

FishBase records a maximum of 5 cm standard length for male or unsexed fish. Standard length measures the body without the tail fin, and domestic tail proportions vary. Use 5 cm as the adult body-length planning reference rather than treating the 3–3.5 cm dispatch grade as a permanent size.

Seriously Fish gives a broader species reference of 6 cm standard length without limiting that figure to this male offer. For this explicitly male product, the FishBase male or unsexed maximum is the more directly matched figure. Neither measurement promises the exact final length of one individual.

The species naturally occurs across parts of northern South America, including Venezuela, Trinidad, Barbados, northern Brazil and the Guianas. Wild guppies occupy varied habitats, from ponds, ditches and canals to streams, and FishBase describes a diet containing zooplankton, small insects and detritus. Those facts explain the guppy’s adaptable feeding biology, but aquarium portions and maintenance still need a controlled routine.

Adult planning must also account for the broad fan tail, active swimming and social group. A short body does not justify solitary housing or a tiny container. Give the group useful horizontal space, open swimming room and places where one fish can move out of another’s line of sight.

Start with the conservative care baseline

Our complete Guppy Care Guide uses a routine aquarium range of 22–28°C and a conservative house plan of an aquarium at least 60 cm long with five or more guppies where filtration, water tests, sex planning and other livestock allow. This can suit a prepared beginner, but the aquarium must be matured, filtered and tested before livestock enters it.

OATA’s guppy-and-molly guidance covers the group and gives 20–28°C, pH 7.0–8.0, 8–18 dGH, at least three companions and at least 45 litres for a small group of the smaller livebearers. The routine 22–28°C, pH 7.0–8.0 and 9–18 dGH plan is the overlap of FishBase, Seriously Fish, OATA and our store guidance. We use the longer 60 cm aquarium and five-or-more social policy for this species.

Treat these figures as connected decisions. Five fish are not automatically suitable because an aquarium has a particular litre label, and a 60 cm aquarium is not permission to fill every remaining space. Check its footprint, actual water volume, filter capacity, existing animals, sex mix and behaviour together.

Prepare a mature, filtered aquarium before the fish arrives

Begin with a fully functioning biological filter. The RSPCA explains that aquarium filtration supports bacteria that convert toxic ammonia to nitrite and then to safer nitrate. Fish must not be used to start that process. Confirm zero detectable ammonia and nitrite with water tests before introducing the guppy.

If this is your first setup, follow our guide to preparing and maturing a tropical aquarium before choosing an arrival date. Maturity is demonstrated by stable conditions and repeated test results, not simply by the number of days the aquarium has contained water.

Check length, footprint and filtration together

Seriously Fish gives a 45 × 30 cm base and approximately 41 litres for Poecilia reticulata. FishBase separately gives a 60 cm minimum aquarium length, so our house plan uses the more conservative 60 cm length for a small social group.

Seriously Fish uses a turnover of four to five times aquarium volume per hour for its approximately 41-litre example, equivalent to about 165–205 litres per hour. Treat that as a worked example, not a universal filter rating: the correct unit must suit the aquarium’s actual water volume, media, layout and livestock while leaving the guppies able to swim normally.

Balance open swimming water with cover and gentle flow

Arrange the aquarium so the males can swim freely and also move out of one another’s view. Planting around the rear and sides, floating vegetation and well-spaced cover can create useful sight breaks without filling every swimming lane. Seriously Fish notes that planted aquariums and floating vegetation are appreciated, while strong currents should be avoided.

Long ornamental fins increase the importance of observing flow. A filter outlet should circulate and oxygenate the water without pinning the tail, sweeping the fish across the aquarium or making it hold position continuously. If every guppy crowds into the quietest corner, reduce or redirect the current while preserving filtration and surface movement.

Use the fish’s behaviour to test the layout

Use smooth aquarium-safe furnishings and keep filter intakes safe for small fish. A secure cover is a sensible part of the store’s guppy setup policy. Cover and plants do not compensate for crowding, weak filtration or an unsuitable social plan; they support a properly sized aquarium rather than replacing it.

Dense planting can shelter fry if mixed sexes are housed together. That may increase survival, so decide whether raising young is intentional before creating extensive nursery cover. Population planning must happen before the aquarium becomes crowded.

Keep temperature and mineral-bearing water stable

Use 22–28°C as the routine aquarium range, with pH 7.0–8.0 and general hardness of 9–18 dGH. This is the overlap of FishBase, Seriously Fish, OATA and Tropical Fish Co guidance. Stability within the working range is safer than repeatedly altering water to chase one exact decimal.

OATA also gives 5–15 dKH for guppies and mollies. Carbonate hardness helps describe buffering capacity, while general hardness reflects dissolved minerals. Test the actual tap water and aquarium rather than assuming every UK supply has the same chemistry.

Our water chemistry guide explains what each test measures. Once you have real results, use the water matcher to compare them with the working range.

Dechlorinate replacement tap water before it reaches the aquarium and avoid sudden changes in temperature or chemistry. Do not add aquarium salt merely because guppies can occur in brackish habitats. Any mineral adjustment needs a measured purpose and must remain suitable for every fish, invertebrate and plant in the system.

If a room cannot keep the aquarium within 22–28°C, use a thermostatically controlled aquarium heater and verify the water temperature independently. Select heater power for the aquarium volume and room conditions rather than relying on one wattage for every setup.

Feed a complete staple in small once-daily portions

Use an appropriately sized, nutritionally complete omnivore flake or granule as the staple. OATA recommends a good-quality flake or granule with a high algae content for guppies and mollies, supplemented with suitable small live or frozen foods such as daphnia, small bloodworm or tubifex.

Feed once daily and offer only what the group can consume within a few minutes. This group schedule is a practical starting routine for established fish. Portion size still depends on the number of fish, food size and whether every individual can reach it.

Watch the whole group eat

• Break or choose food small enough for each guppy to take cleanly.
• Distribute the portion so one fast fish cannot monopolise it.
• Check that quieter or newly introduced males take food.
• Remove persistent leftovers before they break down.
• Reduce the next portion if food repeatedly reaches the substrate uneaten.

Wild guppies feed on zooplankton, small insects and detritus, while Seriously Fish describes wild fish as primarily insectivorous. That biology supports safe invertebrate variety, but it is not an instruction to collect insects or detritus outdoors. Use foods intended for aquarium animals and keep the complete staple at the centre of the routine.

More food does not guarantee stronger colour or faster healthy development. Excess food increases waste, placing more pressure on the biological filter and raising the risk of deteriorating water quality. If appetite drops, test the water and observe breathing, swimming and social pressure rather than automatically offering a larger or richer meal.

Where fry are intentionally raised, they need food that fits their mouths and especially close water-quality monitoring. The adult routine should not be copied blindly into a nursery containing much smaller fish.

Follow the store’s arrival and acclimatisation steps

Prepare the mature aquarium before the journey. OATA’s care guidance calls for zero detectable ammonia and nitrite, while the Tropical Fish Co care guide uses 22–28°C, pH 7.0–8.0 and 9–18 dGH as the shared routine range. Check that the filter and heater are operating before the fish arrives.

Our delivery and Live Arrival Guarantee policy requires someone to be present to receive live fish. Film every delivery continuously from the sealed parcel, showing it being opened and the fish still inside the sealed bag. Float the bag for 20–30 minutes before release, and never pour the bag water into the aquarium.

First-day sequence

1. Receive the parcel in person so it is not left unattended.
2. Start filming while the parcel is still sealed and keep filming continuously as it is opened.
3. Show the fish still inside the sealed bag before anything is disturbed.
4. Float the bag for 20–30 minutes.
5. Release the fish without pouring the bag water into the aquarium.

A new fish enters an established social structure as well as new water, so watch whether existing residents crowd, chase or exclude it. Use the prepared separation option if the newcomer cannot rest, feed or swim without persistent interference.

During the first day, focus on breathing, balance, fins and swimming rather than judging the final colour pattern. If the fish gasps at the surface, loses balance, holds its fins clamped or cannot swim normally, test water immediately and follow the health response plan rather than assuming the behaviour will resolve by itself.

Use weekly tests and partial water changes to protect stability

Test ammonia, nitrite and nitrate at least once each week, with additional checks after adding fish, changing feeding, cleaning the filter or seeing altered behaviour. Ammonia and nitrite must remain at zero. Record the results so a gradual change is visible before it becomes an emergency.

OATA strongly recommends a partial water change of 25% at least once every week. Treat the replacement water with tap-water conditioner to remove chlorine or chloramine before adding it, and avoid abrupt temperature or chemistry changes.

Weekly maintenance order

1. Observe the fish before disturbing the aquarium.
2. Test temperature, ammonia, nitrite and nitrate.
3. Check pH and hardness often enough to identify changes in the source or aquarium.
4. Siphon settled waste while removing 25% of the water.
5. Condition the replacement water and add it gradually.
6. Check filter flow and inspect the intake and outlet.
7. Record the results and any change in appetite, breathing or behaviour.

If filter media needs cleaning, rinse it lightly in water removed from the aquarium rather than under the tap. Chlorine or chloramine can damage the beneficial bacteria that support biological filtration. Do not replace all mature media at once unless the filter manufacturer’s safety instructions require a specific action.

A larger aquarium can improve environmental stability, but it still needs testing and maintenance. Clear water alone cannot show whether ammonia, nitrite, nitrate, pH, hardness and temperature are suitable.

Respond to health changes with measurements before treatment

A settled guppy should swim steadily, breathe regularly, hold open undamaged fins, maintain a normal body profile and feed consistently. The RSPCA’s fish health guidance treats altered swimming, breathing, appearance and appetite as reasons to investigate promptly.

Warning signs include surface gasping, sitting on the bottom, erratic swimming, unusual hiding, darker or paler colour, faster or slower gill movement, white spots, fluffy growths, wounds, lost scales, damaged fins, body-condition change or reduced feeding. These signs are observations rather than diagnoses.

Work through the immediate checks

1. Test ammonia, nitrite, nitrate, pH and temperature.
2. Check filter flow, heater operation and surface movement.
3. Review recent water changes, cleaning, food and new introductions.
4. Watch whether chasing or feeding competition is affecting one fish.
5. Isolate safely where appropriate, using a mature filtered system.
6. Seek qualified diagnosis before choosing medication, salt or heat treatment.

The MSD Veterinary Manual recommends at least 30 days of quarantine, with longer isolation where indicated. A quarantine aquarium needs biologically supported filtration, suitable temperature, testing and dedicated equipment; an uncycled container is not a safe substitute.

Use OATA’s UK fish-vet directory when diagnosis or treatment is needed. Do not select medication from one symptom alone, and do not combine treatments without checking their lawful labels and suitability for every animal in the treatment system.

Keep dated notes or photographs of changes. A clear timeline of water tests, behaviour, appetite and recent maintenance helps distinguish a sudden environmental problem from a longer-developing condition and gives a fish vet more useful information.

Build a social plan that accounts for male display and chasing

Guppies are social fish. FishBase advises groups of five or more, and our conservative house policy follows that number where aquarium capacity, filtration, sex planning and other livestock allow. Do not plan permanent solitary housing for this male.

A male-only group avoids new mixed-sex mating within that group, but it does not guarantee an end to display or chasing. Watch whether every male can swim, rest and feed without repeated cornering or fin damage. Sight breaks help distribute attention, while a safe separation option gives you a response if the group does not settle.

If males and females are combined, OATA suggests at least two females for each male to reduce pressure on females and other tank inhabitants. That ratio is a planning floor rather than a guarantee of calm behaviour. Persistent pursuit, hiding, missed feeding, clamped fins or damage means the social arrangement needs intervention.

Guppies are livebearers, and a mixed-sex group may produce fry. Adult fish may eat young, while dense cover may increase fry survival. Decide in advance how young fish would be housed, fed and responsibly rehomed instead of relying on predation to control numbers.

For a stocking and compatibility assessment, contact us with the aquarium’s internal dimensions, actual water volume, current test results, filter, existing livestock and planned number of guppies. Those details are more useful than a litres-only calculation.

Screen every tank mate for water, fins, size and feeding

Seriously Fish describes Poecilia reticulata as peaceful but says not to keep it with fin-nipping species such as tiger barbs and serpae tetras. OATA likewise advises against species that may nip guppy fins. The large patterned tail makes that warning especially important for this male form.

Apply the same screen to every proposed companion

1. Compare routine temperature, pH and hardness, aiming for comfortable overlap rather than opposite edges.
2. Use adult size and mouth size to judge whether either animal could swallow or injure the other.
3. Check fin-nipping, territorial, courtship and feeding-competition risks.
4. Allow for the complete social group required by each species.
5. Confirm that flow and layout work for both animals.
6. Keep a separation plan ready if observed behaviour changes.

Endler’s livebearer is a distinct species, Poecilia wingei. Its formal species description and current entry in Eschmeyer’s Catalog of Fishes support that distinction. Guppies and Endlers can hybridise, so keep documented lines apart if preserving their identity matters.

Compatibility remains conditional on the actual aquarium. A companion that passes the water test may still fail because of adult size, flow, group space or behaviour. Observe feeding and fins after every introduction and act when one animal is excluded rather than waiting for visible injury.

Answer the main buying and care questions

How big does the Male Cobra Mix Guppy get?

The Male Cobra Mix Guppy reaches up to 5 cm standard length for male or unsexed fish according to FishBase. The recorded 3–3.5 cm dispatch grade is the supplied size, not the adult planning size.

What size aquarium does the Male Cobra Mix Guppy need?

Use a mature, filtered aquarium at least 60 cm long. Seriously Fish gives a 45 × 30 cm base and approximately 41 litres, while OATA gives at least 45 litres for a small group of smaller livebearers; litres alone do not determine capacity.

How many Male Cobra Mix Guppies should I keep together?

Plan five or more guppies where aquarium capacity and the sex plan allow, following FishBase and Tropical Fish Co guidance. Do not plan permanent solitary housing, and monitor food access, chasing and fin condition.

Does the Male Cobra Mix Guppy suit beginners?

The Male Cobra Mix Guppy suits a prepared beginner who starts with a mature, filtered aquarium, zero detectable ammonia and nitrite, stable mineral-bearing water and a planned social group.

What does the Male Cobra Mix Guppy eat?

Feed an appropriately sized complete omnivore flake or granule once daily, offering only what the group consumes within a few minutes. OATA also supports small live or frozen foods such as daphnia, small bloodworm or tubifex for variety.

What temperature and pH does Poecilia reticulata need?

Maintain 22–28°C, pH 7.0–8.0 and 9–18 dGH. These values are the overlap of FishBase, Seriously Fish, OATA and Tropical Fish Co guidance; ammonia and nitrite must remain at zero detectable mg/l.

Is this fish aggressive or likely to nip fins?

Seriously Fish describes it as peaceful, although male guppies may display and chase. Avoid known fin-nipping species such as tiger barbs and serpae tetras, and intervene if pursuit, exclusion or fin damage becomes persistent.

Which animals can it live with?

Seriously Fish names other livebearers, rasboras, corydoras, small loricariids and tetras for a quiet community aquarium. Screen the exact species for adult size, water overlap, flow, complete group space and feeding behaviour, and avoid fin nippers or animals able to swallow it.

How does it arrive alive in the UK?

Someone must be present to receive it. Film every delivery continuously from the sealed parcel as it is opened, showing the fish still inside the sealed bag; float the bag for 20–30 minutes, then release the fish without pouring the bag water into the aquarium.

Check the care and identity references

• FishBase: Poecilia reticulata — accepted identity, family, distribution, environment, wild biology, recorded length and aquarium group note.
• Seriously Fish: Poecilia reticulata — aquarium dimensions, water ranges, diet, behaviour and sex characteristics.
• OATA: guppies and mollies — UK group guidance on water, social planning, feeding and maintenance.
• RSPCA: aquarium environment — filtration and biological waste processing.
• Eschmeyer’s Catalog of Fishes: Poecilia reticulata — accepted scientific name.
• RSPCA: fish health and welfare — health observations and escalation.
• MSD Veterinary Manual: aquarium fish management — quarantine and water-quality-led investigation.
• OATA: find a fish vet — UK fish-vet directory.
• Poeser, Kempkes and Isbrücker: description of Poecilia wingei — formal Endler species description.
• Eschmeyer’s Catalog of Fishes: Poecilia wingei — current scientific status of Endler’s livebearer.