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