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Cardinal Tetra
Cardinal Tetra
Origin
Brazil
Colombia
Venezuela
South America
Habitat Size
20-50 Liters
Water Type
Fresh Water
Water Temperature
23º-27ºC
Cost in India
₹50 - ₹100
Size
1.2 - 2 inches (Nano)
Diet
Omnivore



by Happy Pet TeamUpdated on 19 Nov 2025
Cardinal Tetra Fish (Paracheirodon axelrodi) Introduction
Cardinal Tetra Fish is a captive freshwater marine native to the blackwater and clearwater tributaries of the Amazon Basin in South America. It is loved by aquarists primarily because of the vibrant blue and red colouration.
The Cardinal Tetra Fish adds a dash of vibrancy to the aquarium. It boasts a full-length red stripe, unlike its close relative; the Neon Tetra. The fish is commonly known as Red Neon Tetra by many.
Size of Red Neon Tetra
Cardinal Tetra size is about 4–5 cm (1.5–2 inches) in length, making them slightly larger and more vividly colored than Neon Tetras.
Cardinal Tetra Fish Life Expectancy
Cardinal Tetra lifespan is up to 5 years or more. It can grow bigger if kept properly under captivity.
Cardinal Tetra Price
Cardinal Tetra price varies depending on the vendor and location. It is available for purchase in India at prices ranging from ₹80 to ₹150 per pair.
Best Tank Mates
- Neon Tetras
- Harlequin Rasboras
- Corydoras Catfish
- Otocinclus Catfish
- Shrimp species like Amano and Cherry Shrimp
Avoid Pairing with
- Large, aggressive fish such as Cichlids or Arowanas
- Fin-nipping species like Barbs
- Predatory fish that may view Tetras as prey
Characteristics
Temperament
Aggressive
Friendly
Compatibility with other fishes
Not Friendly
Super Friendly
Habitat Size
Small
Large

Cardinal Tetra Fish Habitat
Initial Setup Cost
₹3,000 - ₹6,000
Water Temperature
23º -27ºC
Water Type
Fresh Water
PH Level
4 - 6.5
Maintain the habitat given below to ensure the Cardinal Tetra fish thrives and lives a long and happy life.
Essential Equipment
Aquarium tank
Water filter
Heater
Light
Substrate
Decor
Dietary Needs of Cardinal Tetra Fish
Avg Monthly Expenses
₹50 - ₹ 100
Cardinal Tetra fish is omnivorous and thrive on a varied diet.

Health & Care of Cardinal Tetra Fish
Common Health Issues
Fin rot
White spot / ick
Ammonia poisoning
Fungus
Swim bladder disease
Bacterial infections
Signs of good health
Active
Bright coloration
Good apetite
Signs of sickness
Loss of appetite
Lethargic behaviour
Frequent hiding
Dull coloring
Swimming abnormally
Cardinal Tetras are hardy when kept in stable, clean conditions. Regular maintenance and balanced feeding are key to their long, healthy life.
- Maintain optimum water quality
- Keep a stable temperature
- Feed in moderation & avoid overfeeding
- Watch for common diseases
- Avoid sudden lighting changes
Prerequisites for a Fish
Adequate tank space
Cleanliness
Effort & commitment
Enriching Environment

Written by
Happy Pet TeamAuthor
Team Happy Pet is a passionate collective of pet experts, enthusiasts, and advocates dedicated to sharing trusted and insightful content.
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Frequently Asked Questions
How many Cardinal Tetras should be kept together?
Cardinal Tetras should be kept in groups of at least six to promote natural schooling behavior and reduce stress.
What should I feed my Cardinal Tetras?
A varied diet of high-quality flake food, small pellets, and live or frozen foods like brine shrimp and daphnia.
Do Cardinal Tetras breed easily in home aquariums?
Breeding Cardinal Tetras can be challenging in home aquariums due to specific water parameters and conditions needed for successful spawning and fry survival.

