Best for
Aquariums where its role fits: territorial cichlid.
R
Fish · Freshwater
Red tail shark
Epalzeorhynchos bicolor
Red tail shark is a very popular aquarium species suitable for well maintained home aquariums.
Difficulty
Intermediate
Aggression
8/10
Schooling
Low
Size
15.00 cm
Minimum volume
150 L
Temperature
22.0-27.0 ºC
Zone
Bottom
Lifespan
6 years
Quick profile scan
fish
Territoriality
Critical
Aggression
8/10
Activity
Moderate
Thermal sensitivity
Medium
Bioload
Medium
Speed
Moderate
Predation risk
Opportunistic
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Analyze volume, parameters, behavior and relationships with other species.
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Quick verdict
A practical summary to quickly decide whether it fits your aquarium.
Typical risk
Stability depends on temperature, group size, and real compatibility.
Aquarium zone
Where it lives best
Surface
Midwater
Bottom
primary
Quick compatibility
Community signals
Shrimp
Conditional
Snails
Compatible
Slow fish
Conditional
Aggressive fish
High risk
Small fish
Conditional
Large fish
Conditional
Delicate plants
Conditional
Buying decision
Before buying Red tail shark
Review these points before adding it to your aquarium. They are practical notes based on its profile, ecological data, and known relationships.
L
Adult volume
Make sure your aquarium is above 150 L before buying it.
T
Territory and cover
Prepare visual cover and calm areas if it will live with other species.
Parameters
Water conditions
pH
6.5 - 7.5
GH
5 - 15
KH
3 - 8
Temperature
22.0 - 27.0 ºC
Growth and behavior
Juvenile to adult
Juvenile
As a juvenile it is usually more flexible and less dominant than an adult. Even so, it benefits from cover, stable parameters and tank mates that do not compete intensely in the bottom.
Shift
The most important adult change is increased spatial and biological pressure, so the aquarium should be planned for the long term.
Adult
As an adult it may defend specific areas and increase pressure on tank mates that stay too close. The aquarium layout should include visually separated territories.
Ecological profile
Role and biological pressure
Territorial Cichlid
Algae Grazer
Medium
Medium
Moderate
Opportunistic
Profile: territorial cichlid or fish, with medium bioload and primary use of the bottom. It does not rely on a strong school, but it still needs a balanced community without harassment. It may show opportunistic predation toward fry or very small animals. Provide hiding places, visual barriers and enough room to prevent constant pressure.
Ecological radar
profile
Territoriality
96%
Aggression
80%
Activity
52%
Thermal sensitivity
52%
Bioload
52%
Common mistakes
What to avoid
Keeping it in tanks below the recommended adult volume.
Designing the aquarium without shelter or visual barriers.
Essential care
Keep it with carefully chosen tankmates and perform weekly water changes with stable parameters.
Daily time
10 min
Breeding
Breeding in aquariums is possible when good conditions are provided and a suitable setup is prepared.
Oviparous
Moderate
Machos algo más esbeltos; hembras más robustas
Alerts and health
- Espacio para nadar
- Refugios
- Compañeros robustos
Common issues
Ich
Parásitos
Expert notes
Interesting details
01
Es una especie muy popular en acuariofilia
02
Se aprecia más cuando se mantiene correctamente
Editorial confidence
Last review: June 2026
Content based on parameters, ecological profiles and manual relationships.
Profile data
Ecological profile
Manual relationships
General aquarium observation
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