Native Biome: Blackwater streams and aquariums.
Neon Tetra
Paracheirodon innesi
Famous neon-blue and red stripe schooling tetra from South America.
Linnaean Taxonomic Tree
<1 g
Female: Slightly fullerQuick school darts
Burst Acceleration2–3 years
Captivity: 3–5 yearsCompare Look-Alikes
vs Guppy
🐣Growth & Lifespan
Birth to old age slider
🔍 Distinctive Diagnostic Markings & Anatomy
Critical morphological field marks naturalists use to verify species identification in the wild.
Iridescent blue lateral stripe with red from mid-body to tail.
Small terminal mouth.
Large for size.
Soft fins; adipose fin present.
Forked.
Subtle
🍖 Trophic Role & Hunting Strategy
OmnivoreMicropredator of tiny invertebrates.
🏕️ Social Behavior & Activity Rhythms
DiurnalObligate schooling
No care
Life Cycle, Growth & Lifespan Journey
| Age | Stage | Length/Height | Weight |
|---|---|---|---|
| Birth / Hatch / Day 0 | Young | 2–3 mm | 0.000002–0.000005 g |
| Early growth | Young | 5.4–7.4 mm | 0.06–0.18 g |
| Mid juvenile | Juvenile | 11.8–16 mm | 0.175–0.525 g |
| Late juvenile | Juvenile | 18.8–25.2 mm | 0.3–0.9 g |
| Near maturity | Adult | 25.8–34.5 mm | 0.425–1.3 g |
How Big Will a Neon Tetra Get?
Calculate estimated adult weight, shoulder height, remaining growth timeline, and weekly development rate based on current age and biometrics.
Conservation Status & Population Dynamics
Captive abundant
Subject to ongoing wildlife telemetry monitoring
- •Wild habitat change
- Habitat protection
- Public education
Field Intelligence & Diagnostic Hub for Neon Tetra
Forked.
Audio frequency analysis, territorial roar/call synthesis, and harmonic resonance measurements.
Ecosystem food web, trophic interactions, and cohabiting species in Amazon / Aquarium.
⚖️ Look-Alike Species Differentiation Matrix
Instant one-click comparison tools to prevent common field misidentifications
Neon Tetra vs. Guppy
Key DifferentiationGuppies are livebearers with ornate male tails; neon tetras are tiny egg-laying characins with a neon stripe.
Neon tetra tank size & care
- Minimum tank
- 54 L (14 US gal)
- Adult size
- 3.5 cm (1.4 in)
- Temperature
- 20–26 °C (68–79 °F)
- pH
- 5–7.5
- Group
- At least 10
- Temperament
- Peaceful
- Care level
- Easy
Typical husbandry values from Seriously Fish, FishBase and OATA. Captive-bred fish often tolerate a wider range.
Neon Tetra Tank Calculators
Neon tetras are small schooling fish that should be kept in a group, not alone or in pairs. Small fish still need stable water: a new tank should be fully cycled before they go in, and a heater keeps tropical temperatures steady.
Find the real volume of your tetra tank with the fish tank size calculator before you plan your school.
Figures:Merck Veterinary Manual: Management of aquarium fish
Aquarium Size Calculator
Tank volume in litres and gallons, and the real water volume after substrate and decor.
Open calculator
Heater Calculator
Heater wattage from tank size, room temperature and the temperature your fish need.
Open calculator
Water Change Calculator
How much water to change, and the percentage that brings nitrate down to your target.
Open calculatorHow to Identify Neon Tetra from a Photograph
Standard operating procedures for photographers and field naturalists submitting sightings for verification.
- 📷Clear side profile
- 📷Head/face close-up
- 📷Full body in natural light
- 🔍Blue neon stripe
- 🔍Red lower rear body
- 🔍Tiny schooling fish
- ⚠️Confusing with cardinal tetra (red extends further forward)
Frequently Asked Questions About Neon Tetra
Verified answers compiled by zoologists, wildlife biologists, and field guides.
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