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