P
Pajama Cardinalfish
Sphaeramia nematoptera
VS
S
Swordtail
Xiphophorus hellerii
Choosing between Pajama Cardinalfish and Swordtail? 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.
Pajama Cardinalfish
Sphaeramia nematopteraVS
Swordtail
Xiphophorus helleriiCommon Name
Pajama Cardinalfish
Swordtail
Scientific Name
Sphaeramia nematoptera
Xiphophorus hellerii
Type
Saltwater / Marine
Freshwater
Difficulty
Beginner Friendly
Beginner Friendly
Temperament
Peaceful
Peaceful
Minimum Tank
20 gallons
15 gallons
Recommended Tank
30 gallons
29 gallons
Temperature
72°F - 78°F
72°F - 82°F
pH Range
8.1 - 8.4
7 - 8.4
Max Size
3 inches
5.5 inches
Lifespan
5-8 years
3-5 years
Diet
Marine pellets, Frozen Mysis shrimp, Frozen brine shrimp, Marine flakes
High-quality flake food, Algae-based foods, Vegetable matter, Frozen bloodworms, Brine shrimp, Daphnia
Pajama Cardinalfish
✓ Good For
- Community tanks
- Beginners
- Schooling displays
Swordtail
✓ Good For
- Community tanks
- Beginners
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