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X-Ray Tetra
X-Ray Tetra
Origin
Brazil
Guyana
Suriname
South America
Habitat Size
20-50 Liters
Water Type
Fresh Water
Water Temperature
22º-28ºC
Cost in India
₹50 - ₹100
Size
1.5 - 2 inches (Nano)
Diet
Omnivore
by Happy Pet TeamUpdated on 17 Nov 2025
Introduction to X-Ray Tetra Fish (Pristella maxillaris)
X-Ray Tetra fish is a small, peaceful, translucent-bodied freshwater marine popular in community aquariums. It is also known as X-Ray fish & Pristella Tetra fish. They boast a semi-transparent body that offers visibility of internal structures like the backbone. Thus, giving the fish “X-Ray” name.
X-Ray Tetra Fish are native to South American river systems (Amazon, Orinoco basins, and coastal rivers). It inhabits slow-moving waters with soft substrates and vegetation. They are suitable for beginner aquarists as well.
X-Ray Tetra Size
The size of X-ray fish is close to 4 to 5 cm (1.6 – 2.0 inches) in a well-maintained aquarium.
X-Ray Tetra Lifespan
The fish can live anywhere between 4 to 5 years. It can live a little longer if good habitat is maintained.
X-Ray Tetra Price Guide
X-Ray Tetra price ranges anywhere between ₹30 to ₹600 . It can be bought from online stores or offline aquariums.
Best Tank Mates
- Other small tetras (e.g. neon, ember)
- Small rasboras (e.g. harlequin rasbora)
- Guppies, mollies, platies (peaceful livebearers)
- Small loaches, small peaceful bottom dwellers
- Apistogramma (smaller dwarf cichlids) - if temperament is mild
Avoid Pairing With
- Larger predatory fish (e.g. large cichlids, big catfish)
- Fin-nippers or aggressive barbs
- Aggressive or territorial species
Characteristics
Temperament
Aggressive
Friendly
Compatibility with other fishes
Not Friendly
Super Friendly
Habitat Size
Small
Large
X-Ray Tetra Habitat Needs
Initial Setup Cost
₹3,000 - ₹6,000
Water Temperature
22º -28ºC
Water Type
Fresh Water
PH Level
6 - 7.5
The following aquarium environment must be maintained for healthy & thriving X-Ray Tetra fish.
Essential Equipment
Aquarium tank
Water filter
Heater
Light
Substrate
Decor
Diet of X-Ray Tetra Fish
Avg Monthly Expenses
₹50 - ₹ 100
The Tetra fish are omnivores in nature. They’ll eat both plant-based and animal-based foods.
Health & Care Considerations for X-Ray Tetra Fish
Common Health Issues
Fin rot
White spot / ick
Fungus
Bacterial infections
Parasitic infections
Swim bladder disease
Signs of good health
Active
Bright coloration
Good apetite
Signs of sickness
Loss of appetite
Lethargic behaviour
Dull coloring
Tattered fins
White growths
Take care of X-Ray fish based on the parameters given below.
- Avoid overcrowding or suboptimal water conditions to prevent colour fading
- Quarantine the affected fish instantly
- Keep the tetras in groups of 6 or more as they are schooling fish & need conspecifics for security
- Add many hiding spots as they are easy to spook
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
What size tank is best for X-Ray Tetra fish?
A tank of at least ~15 gallons is recommended for a small school of 6 or more.
How many X-Ray Tetras should I keep together?
Keep them in groups of 6 or more. They thrive better in shoals.
What do X-Ray Tetra Fish eat?
They eat flakes or micro pellets as staple food, supplemented with live/frozen foods like brine shrimp or bloodworms.
Which fish should I avoid with X-Ray Tetra FIsh?
Avoid larger, predatory fish, fin-nippers, and aggressive species that could harm or stress the tetras.
What is the life cycle of X‑Ray Tetra?
X‑Ray Tetras live 4–5 years, reaching maturity in about 6–8 months, and spawn by scattering eggs among plants, which hatch in 24–36 hours.