How to Identify and Classify Guppies
  • 1. What is the scientific name for the common guppy?
A) Paracheirodon innesi
B) Betta splendens
C) Carassius auratus
D) Poecilia reticulata
  • 2. Guppies are native to which continent?
A) Europe
B) South America
C) Asia
D) Africa
  • 3. What is the most reliable way to differentiate male and female guppies?
A) Presence of a gonopodium in males
B) Size of the body
C) Shape of the dorsal fin
D) Coloration of the tail
  • 4. What is a gonopodium?
A) A specialized gill for oxygen absorption
B) A defensive spine for protection
C) A modified anal fin used for reproduction
D) A sensory organ for detecting prey
  • 5. Which sex is generally more colorful in guppies?
A) Both are equally colorful
B) Females
C) Males
D) Depends on the breed
  • 6. What is the average lifespan of a guppy in captivity?
A) 8-10 years
B) Less than 6 months
C) 1-3 years
D) 5-7 years
  • 7. Guppies are ovoviviparous, meaning what?
A) They lay eggs
B) They give birth to live young
C) They reproduce asexually
D) They require a host to reproduce
  • 8. What is the gestation period for guppies?
A) Approximately 30 days
B) Approximately 60 days
C) Approximately 15 days
D) Approximately 90 days
  • 9. What is a 'fancy' guppy primarily defined by?
A) Larger body size
B) Higher disease resistance
C) Elaborate tail shapes and colors
D) Unusual fin placement
  • 10. Which tail shape is NOT a recognized guppy tail type?
A) Square tail
B) Round tail
C) Lyretail
D) Delta tail
  • 11. What is a 'cobra' guppy known for?
A) A flattened body shape
B) Bright red coloration
C) Rosette-like patterns on its body
D) A long, flowing tail
  • 12. What is the term for the metallic sheen sometimes seen on guppies?
A) Iridescence
B) Melanism
C) Albinism
D) Xanthism
  • 13. What does 'mosaic' refer to in guppy classification?
A) Irregular patterns of colors on the fins and body
B) A single, solid color
C) A completely transparent body
D) Scale-like patterns
  • 14. What is a 'snake skin' guppy characterized by?
A) Chain-like pattern on the body
B) A rough, textured skin
C) A scale-less body
D) Bright yellow and black stripes
  • 15. What is a common cause of fin rot in guppies?
A) High water temperature
B) Overfeeding
C) Poor water quality
D) Lack of sunlight
  • 16. What is the ideal water temperature for guppies?
A) 50-55°F (10-13°C)
B) 60-65°F (15-18°C)
C) 72-78°F (22-26°C)
D) 85-90°F (29-32°C)
  • 17. What pH level is generally best for guppies?
A) 3.0-4.0
B) 5.0-6.0
C) 8.5-9.5
D) 6.8-7.8
  • 18. Why is it important to quarantine new guppies?
A) To acclimate them to the new tank faster
B) To encourage breeding
C) To prevent the spread of diseases
D) To observe their behavior in isolation
  • 19. What does the term 'strain' typically refer to in guppy breeding?
A) A method of water filtration
B) A type of guppy food
C) A type of aquarium plant
D) A line of guppies bred for specific traits
  • 20. What is inbreeding in guppies likely to cause?
A) Longer lifespans
B) Genetic defects and weakened immune systems
C) Increased size and vibrant colors
D) Higher fertility rates
  • 21. What type of food are guppies considered?
A) Insectivores
B) Omnivores
C) Herbivores
D) Carnivores
  • 22. What does 'dorsal fin' refer to?
A) The tail fin
B) The fin used for steering
C) The fin on the belly of the fish
D) The fin on the back of the fish
  • 23. Which of these is a sign of a healthy guppy?
A) Lethargy
B) Rapid gill movement
C) Clamped fins
D) Active swimming
  • 24. What is 'Ich' in guppies?
A) A viral disease causing popeye
B) A bacterial infection causing fin rot
C) A fungal infection causing cotton-like growth
D) A parasitic disease causing white spots
  • 25. What does 'bioload' refer to in an aquarium?
A) The amount of light needed for plants
B) The weight of the rocks and substrate
C) The type of filter used
D) The amount of waste produced by the inhabitants
  • 26. What is the purpose of cycling a new aquarium?
A) To add nutrients for plants
B) To remove excess chlorine
C) To establish beneficial bacteria
D) To adjust the water temperature
  • 27. Why should you avoid overstocking a guppy tank?
A) It prevents the guppies from swimming
B) It leads to poor water quality
C) It encourages breeding
D) It makes the tank look crowded
  • 28. What is the purpose of a water change?
A) To add more chlorine to the water
B) To remove nitrates and replenish minerals
C) To increase the water temperature
D) To add more beneficial bacteria
  • 29. What is the 'endler'?
A) A closely related species of guppy
B) A type of guppy food
C) A guppy fin type
D) A guppy disease
  • 30. What does the term 'cull' mean in guppy breeding?
A) To feed the guppies a special diet
B) To remove undesirable fish from the breeding line
C) To add new fish to the breeding line
D) To change the water in the breeding tank
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