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How to Identify and Classify Swordtails
Contributed by: Wallis
  • 1. What is the defining characteristic of male swordtails?
A) Bright orange coloration
B) A rounded dorsal fin
C) An elongated lower caudal fin ray
D) Larger body size
  • 2. Swordtails belong to which family of fish?
A) Cichlidae
B) Cyprinidae
C) Characidae
D) Poeciliidae
  • 3. What type of reproduction do swordtails exhibit?
A) Livebearing
B) Mouthbrooding
C) Egg-scattering
D) Egg-laying
  • 4. The 'sword' in swordtails is actually part of the:
A) Caudal fin
B) Pectoral fin
C) Dorsal fin
D) Anal fin
  • 5. What is the scientific name for the common green swordtail?
A) Poecilia reticulata
B) Carassius auratus
C) Betta splendens
D) Xiphophorus hellerii
  • 6. Which swordtail variety is characterized by a black body and red dorsal fin?
A) Nigrocaudatus
B) Kohaku
C) Pineapple
D) Lyretail
  • 7. What is the base coloration of the 'Pineapple' swordtail?
A) Black
B) Yellow
C) Blue
D) Red
  • 8. Which of these is NOT a common color variation in swordtails?
A) Orange
B) Red
C) Lavender
D) Green
  • 9. What is the typical lifespan of a swordtail in captivity?
A) 1-2 years
B) 10+ years
C) 6-8 years
D) 3-5 years
  • 10. What type of environment do Swordtails originate from?
A) Brackish Water
B) Freshwater
C) Frozen Water
D) Saltwater
  • 11. What does 'Xiphophorus' refer to?
A) Live-bearing
B) Sword-bearing
C) Colorful-fin
D) Peaceful fish
  • 12. What is a common disease that affects swordtails?
A) Ich
B) Swim Bladder Disease
C) Dropsy
D) Tuberculosis
  • 13. How can you differentiate between a male and female juvenile swordtail before the sword develops?
A) The color intensity
B) The overall size
C) The anal fin shape
D) Their swimming pattern
  • 14. What is the ideal water temperature for swordtails?
A) 68-82°F (20-28°C)
B) 85-95°F (29-35°C)
C) 32-40°F (0-4°C)
D) 50-60°F (10-15°C)
  • 15. What is a 'Simpson' swordtail?
A) A sterile swordtail
B) A swordtail with an abnormally short sword
C) A swordtail crossbred with a guppy
D) A type of swordtail with distinct fin shapes and patterns
  • 16. Which food is best for swordtails?
A) Granules
B) Algae wafers
C) Meat
D) Flake food
  • 17. What pH level is ideal for swordtails?
A) 7.0-8.0
B) 6.0-7.0
C) 5.0-6.0
D) 8.0-9.0
  • 18. What is the function of the gonopodium in male swordtails?
A) Defense
B) Respiration
C) Digestion
D) Reproduction
  • 19. What does 'Albino' indicate in a swordtail's coloration?
A) Lack of pigmentation
B) Iridescent scales
C) High pigmentation
D) Metallic sheen
  • 20. Which of the following is a common behavior of swordtails?
A) Building nests
B) Schooling in smaller groups
C) Laying eggs on plants
D) Burying themselves in the substrate
  • 21. What is a key consideration when breeding swordtails?
A) Feeding them only live food
B) Separating males and females continuously
C) Keeping the water very acidic
D) Providing ample hiding places for fry
  • 22. What is a 'high-fin' swordtail characterized by?
A) An enlarged dorsal fin
B) Missing caudal fin
C) Extra-long pectoral fins
D) An unusually long sword
  • 23. What is a sign of stress in swordtails?
A) Bright coloration
B) Clamped fins
C) Aggressive behavior towards other fish
D) Active swimming
  • 24. Which fish family are the swordtails closely related to?
A) Koi
B) Tetras
C) Goldfish
D) Platies
  • 25. What do swordtails mainly eat?
A) Algae and small invertebrates
B) Fruit
C) Large insects
D) Other fish
  • 26. How often should you change the water?
A) Daily 50% water change
B) Weekly 25% water change
C) Monthly 25% water change
D) Never
  • 27. Which vitamin can you supplement with to increase growth and health?
A) Vitamin D
B) Vitamin C
C) Vitamin A
D) Vitamin B
  • 28. At what age can swordtails start to breed?
A) 10-12 Months
B) 1-2 Months
C) 6-7 Months
D) 3-4 Months
  • 29. Are swordtails good community fish?
A) Only with big fish
B) Yes
C) No
D) Only with other swordtails
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