B
Black Ghost Knife Fish
Apteronotus albifrons
VS
P
Purple Firefish
Nemateleotris decora
Choosing between Black Ghost Knife Fish and Purple Firefish? 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
Purple Firefish
Nemateleotris decoraCommon Name
Black Ghost Knife Fish
Purple Firefish
Scientific Name
Apteronotus albifrons
Nemateleotris decora
Type
Freshwater
Saltwater / Marine
Difficulty
Advanced
Intermediate
Temperament
Semi-Aggressive
Peaceful
Minimum Tank
75 gallons
20 gallons
Recommended Tank
100 gallons
30 gallons
Temperature
73°F - 80°F
72°F - 78°F
pH Range
6 - 8
8.1 - 8.4
Max Size
20 inches
3 inches
Lifespan
10-15 years
3-5 years
Diet
Live or frozen bloodworms, Krill, Pellets, Small fish
Frozen Mysis shrimp, Frozen brine shrimp, Marine pellets, Copepods
Black Ghost Knife Fish
✓ Good For
Purple Firefish
✓ Good For
- Community tanks
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