B
Black Ghost Knife Fish
Apteronotus albifrons
VS
H
Harlequin Rasbora
Trigonostigma heteromorpha
Choosing between Black Ghost Knife Fish and Harlequin Rasbora? Both are excellent choices, but they have different care requirements and temperaments. Use the detailed comparison below to make an informed decision based on your experience level, tank size, and community goals.
Black Ghost Knife Fish
Apteronotus albifronsVS
Harlequin Rasbora
Trigonostigma heteromorphaCommon Name
Black Ghost Knife Fish
Harlequin Rasbora
Scientific Name
Apteronotus albifrons
Trigonostigma heteromorpha
Type
Freshwater
Freshwater
Difficulty
Advanced
Beginner Friendly
Temperament
Semi-Aggressive
Peaceful
Minimum Tank
75 gallons
10 gallons
Recommended Tank
100 gallons
20 gallons
Temperature
73°F - 80°F
72°F - 81°F
pH Range
6 - 8
6 - 7.5
Max Size
20 inches
2 inches
Lifespan
10-15 years
5-8 years
Diet
Live or frozen bloodworms, Krill, Pellets, Small fish
High-quality flake food, Micro pellets, Frozen daphnia, Bloodworms, Brine shrimp
Black Ghost Knife Fish
✓ Good For
Harlequin Rasbora
✓ Good For
- Community tanks
- Beginners
- Small tanks
- Schooling displays
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