B
Black Ghost Knife Fish
Apteronotus albifrons
VS
S
Swordtail
Xiphophorus hellerii
Choosing between Black Ghost Knife Fish and Swordtail? 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
Swordtail
Xiphophorus helleriiCommon Name
Black Ghost Knife Fish
Swordtail
Scientific Name
Apteronotus albifrons
Xiphophorus hellerii
Type
Freshwater
Freshwater
Difficulty
Advanced
Beginner Friendly
Temperament
Semi-Aggressive
Peaceful
Minimum Tank
75 gallons
15 gallons
Recommended Tank
100 gallons
29 gallons
Temperature
73°F - 80°F
72°F - 82°F
pH Range
6 - 8
7 - 8.4
Max Size
20 inches
5.5 inches
Lifespan
10-15 years
3-5 years
Diet
Live or frozen bloodworms, Krill, Pellets, Small fish
High-quality flake food, Algae-based foods, Vegetable matter, Frozen bloodworms, Brine shrimp, Daphnia
Black Ghost Knife Fish
✓ Good For
Swordtail
✓ Good For
- Community tanks
- Beginners
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