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