B
Black Ghost Knife Fish
Apteronotus albifrons
VS
J
Jack Dempsey
Rocio octofasciata
Choosing between Black Ghost Knife Fish and Jack Dempsey? 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
Jack Dempsey
Rocio octofasciataCommon Name
Black Ghost Knife Fish
Jack Dempsey
Scientific Name
Apteronotus albifrons
Rocio octofasciata
Type
Freshwater
Freshwater
Difficulty
Advanced
Intermediate
Temperament
Semi-Aggressive
Aggressive
Minimum Tank
75 gallons
55 gallons
Recommended Tank
100 gallons
75 gallons
Temperature
73°F - 80°F
75°F - 80°F
pH Range
6 - 8
6.5 - 8
Max Size
20 inches
15 inches
Lifespan
10-15 years
10-15 years
Diet
Live or frozen bloodworms, Krill, Pellets, Small fish
Cichlid pellets, Frozen foods, Live foods, Shrimp, Bloodworms, Vegetable matter
Black Ghost Knife Fish
✓ Good For
Jack Dempsey
✓ Good For
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