Native Biome: Slow freshwater rivers and floodplains; widely kept in aquariums.
Freshwater Angelfish
Pterophyllum scalare
Tall “angel” silhouette from South American cichlids — not related to marine angelfish.
Linnaean Taxonomic Tree
Tens of grams
Female: SimilarGraceful rather than fast
Burst Acceleration5–10 years
Captivity: 10+ years with careCompare Look-Alikes
vs Discus
🐣Growth & Lifespan
Birth to old age slider
🔍 Distinctive Diagnostic Markings & Anatomy
Critical morphological field marks naturalists use to verify species identification in the wild.
Silver with vertical bars; many color morphs in the hobby.
Small pointed snout.
Large, high on the head.
Elongated dorsal and anal fins.
Triangular to lyre-like.
Hard to sex visually
🍖 Trophic Role & Hunting Strategy
OmnivorePicks small invertebrates in midwater.
🏕️ Social Behavior & Activity Rhythms
DiurnalPairs when breeding; otherwise shoaling juveniles
Biparental egg care common
Life Cycle, Growth & Lifespan Journey
| Age | Stage | Length/Height | Weight |
|---|---|---|---|
| Birth / Hatch / Day 0 | Young | 3–5 cm | 0.00001–0.00002 g |
| Early growth | Young | 3.8–6.2 cm | 6–12 g |
| Mid juvenile | Juvenile | 5.4–8.5 cm | 17.5–35 g |
| Late juvenile | Juvenile | 7.2–11 cm | 30–60 g |
| Near maturity | Adult | 9–13.5 cm | 42.5–85 g |
How Big Will a Freshwater Angelfish Get?
Calculate estimated adult weight, shoulder height, remaining growth timeline, and weekly development rate based on current age and biometrics.
Conservation Status & Population Dynamics
Wild + captive abundant
Subject to ongoing wildlife telemetry monitoring
- •Habitat change in wild
- Habitat protection
- Public education
Field Intelligence & Diagnostic Hub for Freshwater Angelfish
Triangular to lyre-like.
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
Freshwater Angelfish vs. Discus
Key DifferentiationDiscus are nearly round with shorter pointed fins; angelfish are triangular-tall with long trailing fins.
Freshwater angelfish tank size & care
- Minimum tank
- 200 L (53 US gal)
- Adult size
- 15 cm (5.9 in)
- Temperature
- 24–30 °C (75–86 °F)
- pH
- 6–7.5
- Group
- Alone or in a group
- Temperament
- Semi-aggressive
- Care level
- Moderate
Tall-bodied: needs a tall tank. Adults eat small tetras such as neons.
Typical husbandry values from Seriously Fish, FishBase and OATA. Captive-bred fish often tolerate a wider range.
Angelfish Tank Calculators
Freshwater angelfish are tall-bodied tropical cichlids with long fins, so tank height matters as much as length. They need steady warm water and a filter that keeps the water clean without pushing them around.
Size a heater for your angelfish tank with the aquarium heater wattage calculator.
Figures:Merck Veterinary Manual: Management of aquarium fish
Heater Calculator
Heater wattage from tank size, room temperature and the temperature your fish need.
Open calculator
Aquarium Size Calculator
Tank volume in litres and gallons, and the real water volume after substrate and decor.
Open calculator
Filter Flow Calculator
Turnover per hour from your filter’s real flow, and the right range for your fish.
Open calculatorHow to Identify Freshwater Angelfish 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
- 🔍Very tall compressed body
- 🔍Long dorsal/anal fins
- 🔍Vertical bars
- ⚠️Confusing with discus (rounder, different fin plan)
- ⚠️Confusing with marine angelfish
Frequently Asked Questions About Freshwater Angelfish
Verified answers compiled by zoologists, wildlife biologists, and field guides.
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