O
Oscar
Astronotus ocellatus
VS
P
Pajama Cardinalfish
Sphaeramia nematoptera
Choosing between Oscar and Pajama Cardinalfish? 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.
Oscar
Astronotus ocellatusVS
Pajama Cardinalfish
Sphaeramia nematopteraCommon Name
Oscar
Pajama Cardinalfish
Scientific Name
Astronotus ocellatus
Sphaeramia nematoptera
Type
Freshwater
Saltwater / Marine
Difficulty
Intermediate
Beginner Friendly
Temperament
Aggressive
Peaceful
Minimum Tank
75 gallons
20 gallons
Recommended Tank
125 gallons
30 gallons
Temperature
74°F - 81°F
72°F - 78°F
pH Range
6.5 - 7.5
8.1 - 8.4
Max Size
14 inches
3 inches
Lifespan
10-20 years
5-8 years
Diet
Cichlid pellets, Live foods, Frozen foods, Vegetables, Shrimp
Marine pellets, Frozen Mysis shrimp, Frozen brine shrimp, Marine flakes
Oscar
✓ Good For
Pajama Cardinalfish
✓ Good For
- Community tanks
- Beginners
- Schooling displays
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