J
Jack Dempsey
Rocio octofasciata
VS
P
Pajama Cardinalfish
Sphaeramia nematoptera
Choosing between Jack Dempsey 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.
Jack Dempsey
Rocio octofasciataVS
Pajama Cardinalfish
Sphaeramia nematopteraCommon Name
Jack Dempsey
Pajama Cardinalfish
Scientific Name
Rocio octofasciata
Sphaeramia nematoptera
Type
Freshwater
Saltwater / Marine
Difficulty
Intermediate
Beginner Friendly
Temperament
Aggressive
Peaceful
Minimum Tank
55 gallons
20 gallons
Recommended Tank
75 gallons
30 gallons
Temperature
75°F - 80°F
72°F - 78°F
pH Range
6.5 - 8
8.1 - 8.4
Max Size
15 inches
3 inches
Lifespan
10-15 years
5-8 years
Diet
Cichlid pellets, Frozen foods, Live foods, Shrimp, Bloodworms, Vegetable matter
Marine pellets, Frozen Mysis shrimp, Frozen brine shrimp, Marine flakes
Jack Dempsey
✓ Good For
Pajama Cardinalfish
✓ Good For
- Community tanks
- Beginners
- Schooling displays
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