S
Swordtail
Xiphophorus hellerii
VS
U
Upside Down Catfish
Synodontis nigriventris
Choosing between Swordtail and Upside Down Catfish? 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.
Swordtail
Xiphophorus helleriiVS
Upside Down Catfish
Synodontis nigriventrisCommon Name
Swordtail
Upside Down Catfish
Scientific Name
Xiphophorus hellerii
Synodontis nigriventris
Type
Freshwater
Freshwater
Difficulty
Beginner Friendly
Beginner Friendly
Temperament
Peaceful
Peaceful
Minimum Tank
15 gallons
20 gallons
Recommended Tank
29 gallons
30 gallons
Temperature
72°F - 82°F
72°F - 79°F
pH Range
7 - 8.4
6 - 7.5
Max Size
5.5 inches
4 inches
Lifespan
3-5 years
5-8 years
Diet
High-quality flake food, Algae-based foods, Vegetable matter, Frozen bloodworms, Brine shrimp, Daphnia
Flakes, Pellets, Frozen foods, Algae wafers
Swordtail
✓ Good For
- Community tanks
- Beginners
Upside Down Catfish
✓ Good For
- Community tanks
- Beginners
- Schooling displays
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