B
Black Ghost Knife Fish
Apteronotus albifrons
VS
R
Redtail Catfish
Phractocephalus hemioliopterus
Choosing between Black Ghost Knife Fish and Redtail Catfish? 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
Redtail Catfish
Phractocephalus hemioliopterusCommon Name
Black Ghost Knife Fish
Redtail Catfish
Scientific Name
Apteronotus albifrons
Phractocephalus hemioliopterus
Type
Freshwater
Freshwater
Difficulty
Advanced
Advanced
Temperament
Semi-Aggressive
Aggressive
Minimum Tank
75 gallons
300 gallons
Recommended Tank
100 gallons
1000 gallons
Temperature
73°F - 80°F
72°F - 79°F
pH Range
6 - 8
6 - 7.5
Max Size
20 inches
48 inches
Lifespan
10-15 years
15-20 years
Diet
Live or frozen bloodworms, Krill, Pellets, Small fish
Fish, Shrimp, Worms, Pellets, Chicken, Beef
Black Ghost Knife Fish
✓ Good For
Redtail Catfish
✓ Good For
Explore More
Similar Comparisons
Discover other popular fish pairings to find your perfect aquarium match.