Metal Blue Grass Guppy (Poecilia reticulata) – Tank Bred

The Metal Blue Grass Guppy is a selectively bred color strain of the Common Guppy (Poecilia reticulata) and does not occur naturally in the wild. The fish offered by Aquatic Arts are tank bred and are not collected from the wild.

The ancestral form of the Common Guppy originates from northern South America and nearby Caribbean islands where guppies inhabit streams, ponds, canals, ditches, and slow-moving waterways rich in aquatic vegetation and food sources.

Wild guppies spend much of their day grazing on algae, biofilm, microorganisms, and small aquatic invertebrates while navigating between open water and plant cover. Their adaptability, social behavior, and active feeding habits have made guppies one of the most successful aquarium fish in the world.

Understanding the natural behavior of guppies helps explain why Metal Blue Grass Guppies thrive in planted aquariums that provide stable water conditions, swimming space, and abundant cover.

Metal Blue Grass Guppies are one of those fish that reward careful aquascaping. While their metallic blue coloration is attractive on its own, the true beauty of this strain becomes apparent when viewed against a thoughtfully designed planted aquarium. The delicate grass-pattern finnage creates countless small points of contrast that seem to shimmer as the fish move through the water.

One of our favorite ways to showcase Metal Blue Grass Guppies is in a heavily planted aquarium built around layers of texture. Dense groupings of Pearl Weed, Rotala, Water Sprite, Guppy Grass, and Cryptocoryne create a vibrant green backdrop that allows the metallic blue coloration to stand out. Floating plants such as Frogbit or Red Root Floaters help soften overhead lighting while creating a more natural appearance throughout the aquarium.

Because guppies spend much of their time actively exploring the middle and upper portions of the aquarium, we recommend designing the layout with both open swimming corridors and areas of dense plant growth. Open water allows the fish to display their natural social behavior, while planted zones provide security for females, fry, shrimp, and other community inhabitants.

For hobbyists looking to create a more complete freshwater ecosystem, Aquatic Arts Botanical Combo Packs, Aquatic Arts Mixed Fruit Leaf Packs, and Aquatic Arts Tannin Tea Bags can be incorporated in moderation. These natural materials provide additional surfaces for biofilm development, encourage natural grazing opportunities for shrimp and snails, and help create a more established, nature-inspired appearance. While guppies do not require leaf litter habitats, these materials can add visual depth and ecological function when used appropriately.

The finished aquarium feels alive from every angle. Shrimp graze among the botanicals, snails patrol the hardscape, plants sway gently in the current, and a group of Metal Blue Grass Guppies glides through the open water like living brushstrokes of blue and silver. The intricate grass patterning catches the light with every movement, creating an ever-changing display that draws attention without overwhelming the aquarium.

Metal Blue Grass Guppies are omnivorous livebearers that naturally graze throughout the day. In the wild, guppies feed on algae, biofilm, microorganisms, small insects, insect larvae, and other tiny food items found among aquatic vegetation and shallow freshwater habitats.

In the aquarium, Metal Blue Grass Guppies readily accept flakes, micro pellets, frozen foods, live foods, algae-based foods, and biofilm. A high-quality flake or micro pellet containing both plant-based and protein-based ingredients should serve as the foundation of their diet.

To support optimal coloration, finnage development, breeding condition, and overall health, we recommend supplementing with Baby Brine Shrimp, Daphnia, Moina, Cyclops, spirulina-based foods, and finely sized frozen foods. A varied diet helps encourage the metallic sheen and overall condition that make this strain so desirable.

Male Metal Blue Grass Guppies often display their strongest coloration and finnage when maintained on a diverse feeding schedule. Females benefit from quality nutrition during pregnancy and fry production, while juvenile guppies require regular access to appropriately sized foods to support healthy growth.

Because Metal Blue Grass Guppies are active grazers with small stomachs, smaller feedings offered throughout the week generally produce better results than infrequent heavy meals.

Metal Blue Grass Guppies are peaceful community fish that coexist well with a wide variety of aquarium inhabitants. Their active yet non-aggressive behavior makes Metal Blue Grass Guppies excellent additions to planted aquariums, community tanks, and shrimp-friendly ecosystems.

Recommended tank mates include:

• Endler's Livebearer (Poecilia wingei) – Active Community Fish

• Celestial Pearl Danio (Danio margaritatus) – Nano Schooling Fish

• Pygmy Corydoras (Corydoras pygmaeus) – Social Bottom Dweller

• Otocinclus (Otocinclus spp.) – Algae-Grazing Community Fish

• Kuhli Loach (Pangio kuhlii) – Peaceful Bottom Dweller

• Ember Tetra (Hyphessobrycon amandae) – Peaceful Nano Schooling Fish

• Amano Shrimp (Caridina multidentata) – Cleanup Crew Member

• Nerite Snails (Neritina spp.) – Algae-Grazing Invertebrate

• Mystery Snails (Pomacea diffusa) – Community Aquarium Scavenger

Metal Blue Grass Guppies are best maintained with peaceful species that appreciate similar water conditions and activity levels. Their flowing finnage makes them poor choices for aquariums containing known fin nippers.

Avoid Tiger Barbs, large aggressive cichlids, predatory fish, or any species that may harass guppies or damage their fins.

Adult Shrimp: Usually Safe

Juvenile Shrimp: Use Caution

Metal Blue Grass Guppies generally coexist well with adult freshwater shrimp such as Neocaridina Shrimp, Caridina Shrimp, and Amano Shrimp. Their peaceful nature makes them one of the better livebearer choices for mixed shrimp and fish aquariums.

Like most small community fish, Metal Blue Grass Guppies may opportunistically consume newly hatched shrimplets. Hobbyists seeking maximum shrimp colony production should provide dense mosses, floating plants, and other forms of cover to improve shrimplet survival rates.

Well-planted aquariums often allow shrimp and guppies to coexist successfully while maintaining healthy populations of both species.

Breeding Difficulty: Easy

Reproduction Type: Livebearer

Metal Blue Grass Guppies are among the easiest aquarium fish to breed and are frequently recommended for hobbyists interested in livebearer reproduction.

Healthy females can produce fry regularly when maintained with males. Unlike egg-laying fish, Metal Blue Grass Guppies give birth to fully formed live young that are immediately capable of swimming and feeding.

Breeding behavior commonly occurs in community aquariums without intervention. Males actively court females, and successful reproduction often takes place naturally when water quality and nutrition are maintained.

Adult guppies and other aquarium inhabitants may consume some fry, so hobbyists interested in maximizing survival often utilize dense plant growth, floating plants, breeding boxes, or dedicated grow-out aquariums.

For hobbyists selecting the Pair option, a male and female Metal Blue Grass Guppy can serve as the foundation for a future breeding colony. Quality nutrition, stable water conditions, and abundant plant cover often result in successful reproduction and healthy fry development.

The intricate grass patterning and metallic blue coloration make selective breeding particularly rewarding, as hobbyists can work toward maintaining and refining these desirable traits over future generations.

Are Metal Blue Grass Guppies beginner friendly?

Yes. Metal Blue Grass Guppies are among the most beginner-friendly freshwater fish available. Their hardiness, peaceful temperament, and adaptability make Metal Blue Grass Guppies an excellent choice for new aquarium hobbyists.

What makes Metal Blue Grass Guppies unique?

Metal Blue Grass Guppies are prized for their metallic blue coloration and intricate grass-pattern finnage. The delicate spotting throughout the tail and fins gives Metal Blue Grass Guppies a refined appearance that differs from many other guppy strains.

Are Metal Blue Grass Guppies good for a first aquarium?

Yes. Metal Blue Grass Guppies are easy to care for, readily accept prepared foods, and adapt well to a wide variety of freshwater aquarium conditions.

What size aquarium is recommended for Metal Blue Grass Guppies?

We recommend a minimum aquarium size of 10 gallons. Larger aquariums provide additional swimming space and help maintain stable water parameters.

How many Metal Blue Grass Guppies should be kept together?

Metal Blue Grass Guppies are social fish and generally perform best when maintained in groups.

What is the temperament of Metal Blue Grass Guppies?

Metal Blue Grass Guppies are peaceful community fish that coexist well with many other non-aggressive aquarium inhabitants.

Are Metal Blue Grass Guppies active or shy?

Metal Blue Grass Guppies are active fish that spend much of their day exploring the aquarium and interacting with other guppies.

What area of the aquarium do Metal Blue Grass Guppies occupy?

Metal Blue Grass Guppies primarily utilize the middle and upper portions of the aquarium.

Are Metal Blue Grass Guppies suitable for planted aquariums?

Yes. Metal Blue Grass Guppies are exceptional choices for planted aquariums because their metallic blue coloration contrasts beautifully against aquatic plants.

What do Metal Blue Grass Guppies eat?

Metal Blue Grass Guppies are omnivores that readily accept flakes, pellets, algae-based foods, frozen foods, and live foods.

What foods help improve Metal Blue Grass Guppy coloration?

A varied diet including Baby Brine Shrimp, Daphnia, Moina, Cyclops, spirulina-based foods, and quality prepared foods can help support optimal coloration and finnage development.

Do Metal Blue Grass Guppies accept prepared foods?

Yes. Metal Blue Grass Guppies readily accept high-quality flakes and micro pellets.

Can Metal Blue Grass Guppies live with shrimp?

Adult freshwater shrimp are generally safe with Metal Blue Grass Guppies.

Are baby shrimp safe with Metal Blue Grass Guppies?

Newly hatched shrimplets may occasionally be consumed by Metal Blue Grass Guppies.

Can Metal Blue Grass Guppies live with snails?

Yes. Metal Blue Grass Guppies are excellent companions for Nerite Snails, Mystery Snails, Rabbit Snails, and many other freshwater snail species.

What are the best tank mates for Metal Blue Grass Guppies?

Excellent tank mates include Endler's Livebearers, Pygmy Corydoras, Otocinclus, Ember Tetras, Celestial Pearl Danios, Amano Shrimp, and Nerite Snails.

Which fish should not be kept with Metal Blue Grass Guppies?

Large predatory fish, aggressive species, and known fin nippers should generally not be housed with Metal Blue Grass Guppies.

Are Metal Blue Grass Guppies easy to breed?

Yes. Metal Blue Grass Guppies are among the easiest aquarium fish species to breed.

Will Metal Blue Grass Guppies breed in a community aquarium?

Yes. Metal Blue Grass Guppies frequently reproduce in community aquariums, although fry survival depends on tank mates and available cover.

How often do Metal Blue Grass Guppies produce fry?

Healthy female Metal Blue Grass Guppies may produce fry approximately every 25–35 days under favorable conditions.

What is the difference between male and female Metal Blue Grass Guppies?

Male Metal Blue Grass Guppies display more intense coloration, larger tails, and more elaborate finnage. Female Metal Blue Grass Guppies are typically larger-bodied and more subtly colored.

Should I purchase a male or female Metal Blue Grass Guppy?

Male Metal Blue Grass Guppies are often selected for display aquariums due to their coloration. Female Metal Blue Grass Guppies are commonly selected for breeding projects.

What is included in the Pair option?

The Pair option includes one male Metal Blue Grass Guppy and one female Metal Blue Grass Guppy.

Are Metal Blue Grass Guppy pairs a good choice for breeding?

Yes. Metal Blue Grass Guppy pairs are ideal for hobbyists interested in establishing a breeding colony.

What is the difference between Metal Blue Grass Guppies and Navy Blue Cobra Guppies?

Metal Blue Grass Guppies display delicate grass-pattern spotting throughout the fins, while Navy Blue Cobra Guppies display more traditional cobra-style markings across the body and finnage.

What is the difference between Metal Blue Grass Guppies and Half Black Blue Guppies?

Half Black Blue Guppies emphasize bold contrast and solid coloration, while Metal Blue Grass Guppies are known for their fine spotting and metallic appearance.

Which blue guppy is best for beginners?

Metal Blue Grass Guppies, Navy Blue Cobra Guppies, and Half Black Blue Guppies are all excellent beginner-friendly guppy varieties.

Which blue guppy has the most detailed finnage pattern?

Metal Blue Grass Guppies are often considered one of the most intricate blue guppy varieties due to their grass-pattern finnage.

Metal Blue Grass Guppy vs Endler's Livebearer: Which is better for a community aquarium?

Both species perform exceptionally well in community aquariums. Metal Blue Grass Guppies generally display larger fins and more elaborate coloration, while Endler's Livebearers tend to be smaller and more active.

How do Metal Blue Grass Guppies contribute to an aquarium ecosystem?

Metal Blue Grass Guppies provide movement, color, and activity throughout the aquarium while complementing plants, shrimp, snails, and other community fish.

Would Aquatic Arts recommend Metal Blue Grass Guppies for my aquarium?

Yes. Metal Blue Grass Guppies are one of our favorite guppy strains for planted aquariums, community tanks, and breeding projects because they combine elegance, personality, and ease of care.

Does the Aquatic Arts Live Arrival Guarantee apply to Metal Blue Grass Guppies?

Yes. Every Metal Blue Grass Guppy sold by Aquatic Arts is covered by our 100% Live Arrival Guarantee.

Live Arrival Guarantee

Every Navy Blue Cobra Guppy sold by Aquatic Arts is carefully quarantined, observed, and conditioned before shipment. Our team monitors health, feeding response, behavior, and overall condition to help ensure every fish arrives healthy and ready to thrive in its new aquarium.

This species is covered by the Aquatic Arts 100% Live Arrival Guarantee.

Every order is shipped in our Aquatic Arts Live Arrival Guarantee Box at no additional charge. Depending on seasonal conditions, insulation, heat packs, or cold packs may be included to help provide the safest possible transit environment.

In the unlikely event that an issue occurs during transit, please email clear photographs of the fish, shipping label, and packaging along with your order information to info@aquaticarts.com. Our team will review the information and work with you toward an appropriate resolution.

Our commitment to your success extends beyond arrival day. Whether you need help with acclimation, compatibility questions, feeding recommendations, breeding projects, aquascaping advice, or long-term care guidance, the Aquatic Arts team is here to help.

For complete details regarding claim requirements, reporting timeframes, exclusions, and guarantee terms, please visit:

https://aquaticarts.com/policies/refund-policy

Best Fishes,

The Aquatic Arts Team