🐠 Costae Tetra

Hyphessobrycon costae | Rare South American schooling tetra with shimmering silver-gold coloration and peaceful community appeal

Enhance your aquarium with the understated elegance of the Costae Tetra. A relatively uncommon species in the aquarium hobby, Hyphessobrycon costae is admired for its shimmering silver body, warm golden hues, and graceful schooling behavior.

Its peaceful temperament and refined appearance make it an excellent choice for planted aquariums, South American biotopes, and well-balanced community tanks.

✨ Why aquarists love Costae Tetras

✔️ Elegant silver-gold coloration — subtle metallic sheen that glows under aquarium lighting
✔️ Rarely available species — an excellent choice for collectors seeking something different
✔️ Peaceful schooling fish — displays natural behavior when maintained in groups
✔️ Perfect for planted aquariums — complements lush aquascapes beautifully
✔️ Hardy and adaptable — suitable for a variety of freshwater community setups

🌍 About the species

Hyphessobrycon costae is native to the freshwater river systems of eastern Brazil, where it inhabits slow-moving streams, tributaries, and vegetated waterways.

These fish are known for:

• Metallic silver body with soft golden highlights
• Slender, streamlined profile
• Graceful synchronized schooling behavior
• Calm and peaceful temperament
• Excellent adaptability to established aquariums

Although less commonly seen than many popular tetras, the Costae Tetra offers a refined beauty that becomes increasingly impressive when kept in larger groups.

🏡 Ideal aquarium setup

Costae Tetras thrive best in:

• Planted aquariums
• Community tanks
• Nature-style aquascapes
• South American biotope aquariums
• Well-maintained freshwater systems

Recommended setup:

• 60 liters or larger
• Dense aquatic plants with open swimming space
• Dark substrate to enhance natural coloration
• Stable water parameters
• Efficient biological filtration

⚠️ Compatibility notes

Costae Tetras are peaceful schooling fish that coexist well with other calm freshwater species.

Not ideal with:

• Large predatory fish
• Aggressive cichlids
• Highly territorial species
• Fish that may intimidate small schooling species

Best suited for:

✔️ Community aquariums
✔️ Planted tanks
✔️ South American biotope setups
✔️ Beginner and experienced aquarists alike

🚚 Professionally packed for live arrival

Every shipment is treated as a live biological transport, not a standard parcel.

Your fish are packed using:

• Oxygen-filled fish bags
• Temperature-insulated packaging
• Shock-absorbing thermocol protection
• Fastest safe transport routes available

This minimizes transit stress and improves live arrival success.

🛡️ Live Arrival Guaranteed*

Instant Refund for DoAs in accordance with our Refund Policy.

👉 You are not taking the risk alone.

🧭 Is this right for you?

✔️ You want a peaceful and elegant schooling fish
✔️ You appreciate uncommon South American tetra species
✔️ You maintain a planted or community aquarium
✔️ You enjoy subtle, natural coloration over exaggerated patterns

⚠️ Not ideal if:

• You keep large predatory fish
• Your aquarium contains highly aggressive species
• You prefer bold, solitary centerpiece fish
• You maintain very small or overcrowded aquariums

🔬 Nero Labs Standard

These fish are maintained with:

• Controlled batch monitoring
• Observation-based selection
• Stress-aware handling
• Survival-focused transport preparation

We prioritize long-term health, coloration quality, and behavioral stability over bulk-volume movement.

👉 Add a rare touch of South American elegance to your aquarium

Experience the subtle beauty, peaceful nature, and graceful schooling behavior of the Costae Tetra from Nero Labs.

Costae Tetra (Hyphessobrycon costae)

Description

The Costae Tetra (Hyphessobrycon costae), offered by Nero Labs, is a selectively maintained ornamental characin recognized for its delicate golden-silver coloration, subtle iridescence, and peaceful schooling behaviour. Native to freshwater river systems of eastern Brazil, this species inhabits slow-moving streams and floodplain environments with dense riparian vegetation, soft substrates, and subdued lighting.

Body coloration typically presents as translucent silver to pale golden with a soft metallic sheen across the flanks. Depending on maturity and environmental conditions, individuals may display subtle green, blue, or bronze iridescence under natural or full-spectrum lighting. A faint lateral stripe and a small humeral marking may be visible, while the transparent fins contribute to the species' refined and understated appearance. Colour intensity and reflective qualities improve progressively with maturity, balanced nutrition, and stable water conditions.

Behaviour is peaceful, active, and strongly schooling-oriented. Individuals exhibit synchronized midwater swimming and develop stable social dynamics when maintained in appropriate shoals. Their calm disposition makes them highly compatible with other peaceful freshwater species, while their subtle coloration creates an elegant display in well-planted aquaria. As with many Hyphessobrycon species, confidence and natural behaviour increase significantly when maintained in larger groups.

Specimens supplied are lab-reared and system-acclimated within controlled, closed-system environments, minimizing early-life stress and supporting reliable long-term adaptation to aquarium conditions. This lineage represents domesticated ornamental stock maintained for behavioural consistency, colour stability, and aquarium suitability rather than wild ecological function or conservation deployment.

System & Rearing Notes

Origin: In-house, Nero Labs
Rearing environment: Controlled, closed system
Line status: Selectively maintained ornamental characin
Behaviour: Peaceful, active, schooling
Swimming profile: Midwater, synchronized open-water movement
Feeding behaviour: Omnivorous; accepts prepared, frozen, and live feeds
Habitat preference: Planted aquaria with open swimming areas, gentle water movement, and subdued lighting
Colour development: Progressive; metallic sheen and subtle iridescence intensify with maturity and environmental stability
Social structure: Group-oriented; best maintained in shoals

Minor variation in body tone, iridescent highlights, and lateral markings may occur between individuals and reflects normal biological diversity within maintained ornamental populations.

Availability & Use

Availability of Costae Tetras is cycle-dependent and determined by biological readiness rather than inventory-driven targets. This species is suitable for beginner to advanced aquarists seeking a peaceful and elegant schooling fish.

Best suited for planted community aquaria, South American-inspired freshwater systems, and mixed-species displays emphasizing natural schooling behaviour, subtle metallic colouration, and harmonious community dynamics.

Important Note

Costae Tetras should be maintained in groups to support natural schooling behaviour and reduce stress. Stable water quality, subdued lighting, and densely planted surroundings help maximize their natural iridescence and encourage confident social behaviour.

Ethical & Operational Context

Distribution of Costae Tetras through Nero Labs prioritizes organism welfare, lineage integrity, and responsible propagation of ornamental schooling species. Proceeds support refinement of characin husbandry protocols, behavioural observation programs, and applied ornamental aquaculture initiatives.