General Fisheries MCQs
1. Which of the following is the largest fish in the world?
a) Whale Shark
b) Great White Shark
c) Bluefin Tuna
d) Swordfish
Answer: a) Whale Shark
2. Which of the following is a freshwater fish?
a) Clownfish
b) Rohu
c) Mackerel
d) Tuna
Answer: b) Rohu
3. Which country is the largest producer of fish in the world?
a) India
b) China
c) Indonesia
d) USA
Answer: b) China
4. Which organ helps fish to regulate buoyancy?
a) Swim bladder
b) Liver
c) Kidney
d) Heart
Answer: a) Swim bladder
5. Which of the following is an anadromous fish?
a) Salmon
b) Catfish
c) Tilapia
d) Eel
Answer: a) Salmon
6. Which is the fastest fish in the world?
a) Sailfish
b) Tuna
c) Barracuda
d) Marlin
Answer: a) Sailfish
7. Which is the largest freshwater fish?
a) Arapaima
b) Catla
c) Rohu
d) Barramundi
Answer: a) Arapaima
8. Which of the following fish is known for producing electric shocks?
a) Electric Eel
b) Shark
c) Catfish
d) Mackerel
Answer: a) Electric Eel
9. Which fish is known for being a good bioindicator of water pollution?
a) Catla
b) Rohu
c) Tilapia
d) Carp
Answer: c) Tilapia
10. Which of the following is a major fish species used in polyculture?
a) Grass carp
b) Trout
c) Clownfish
d) Snapper
Answer: a) Grass carp
Aquaculture MCQs
11. What is the culture of fish in enclosures suspended in water called?
a) Pond culture
b) Cage culture
c) Raceway culture
d) Integrated culture
Answer: b) Cage culture
12. Which fish species is commonly used in integrated fish farming?
a) Tilapia
b) Trout
c) Shark
d) Barramundi
Answer: a) Tilapia
13. Which type of aquaculture involves rearing fish in a controlled system with water recirculation?
a) Open culture
b) Cage culture
c) Recirculating Aquaculture System (RAS)
d) Marine culture
Answer: c) Recirculating Aquaculture System (RAS)
14. Which of the following is a commonly used fish feed ingredient?
a) Rice husk
b) Soybean meal
c) Limestone
d) Sand
Answer: b) Soybean meal
15. Which of the following is an air-breathing fish?
a) Catla
b) Clarias (Magur)
c) Sardine
d) Pomfret
Answer: b) Clarias (Magur)
16. Which method is used to induce spawning in fish through hormone injection?
a) Hypophysation
b) Crossbreeding
c) Artificial incubation
d) Genetic engineering
Answer: a) Hypophysation
17. What is the main advantage of polyculture?
a) Monoculture growth
b) Optimal use of resources
c) Disease reduction
d) Both b and c
Answer: d) Both b and c
18. Which of the following is an example of brackish water fish culture?
a) Carp farming
b) Tilapia farming
c) Shrimp farming
d) Trout farming
Answer: c) Shrimp farming
19. Which species is known as the "aquatic chicken" because of its rapid growth?
a) Tilapia
b) Catfish
c) Salmon
d) Eel
Answer: a) Tilapia
20. Which of the following water quality parameters is most critical for fish survival?
a) Dissolved oxygen
b) Chlorophyll
c) pH
d) Light intensity
Answer: a) Dissolved oxygen
Fishing Gear & Techniques MCQs
21. Which of the following is a passive fishing gear?
a) Trawl net
b) Gill net
c) Purse seine
d) Hook and line
Answer: b) Gill net
22. Which type of net is used for catching pelagic fish?
a) Purse seine
b) Bottom trawl
c) Cast net
d) Dip net
Answer: a) Purse seine
23. Trawl nets are commonly used to catch which type of fish?
a) Surface fish
b) Bottom-dwelling fish
c) Estuarine fish
d) Deep-sea fish
Answer: b) Bottom-dwelling fish
24. What is the primary purpose of a fish aggregating device (FAD)?
a) To catch small fish
b) To attract fish for easier capture
c) To breed fish
d) To mark fishing areas
Answer: b) To attract fish for easier capture
25. Which method is commonly used for tuna fishing?
a) Gill netting
b) Longlining
c) Spearfishing
d) Harpooning
Answer: b) Longlining
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Fish Biology & Physiology MCQs
26. Which part of a fish is used for respiration?
a) Lungs
b) Gills
c) Skin
d) Mouth
Answer: b) Gills
27. Which part of a fish detects vibrations in the water?
a) Lateral line
b) Swim bladder
c) Fins
d) Eyes
Answer: a) Lateral line
28. Which type of scales are found in sharks?
a) Cycloid
b) Ctenoid
c) Placoid
d) Ganoid
Answer: c) Placoid
29. Which fish excretes ammonia directly?
a) Freshwater fish
b) Marine fish
c) Both a & b
d) None of the above
Answer: a) Freshwater fish
30. Which part of the fish body helps in balance and movement?
a) Fins
b) Scales
c) Swim bladder
d) Gills
Answer: a) Fins
Fish Biology & Ecology MCQs
31. Which pigment is responsible for the red coloration in fish muscles?
a) Hemoglobin
b) Myoglobin
c) Chlorophyll
d) Carotenoid
Answer: b) Myoglobin
32. Which of the following is a catadromous fish?
a) Salmon
b) Tilapia
c) European eel
d) Trout
Answer: c) European eel
33. Which sense is the most developed in most fish species?
a) Vision
b) Smell
c) Hearing
d) Taste
Answer: b) Smell
34. What is the term for a group of fish swimming together in a coordinated manner?
a) School
b) Pack
c) Flock
d) Herd
Answer: a) School
35. Which fish species is well known for its ability to change sex during its lifetime?
a) Clownfish
b) Catfish
c) Rohu
d) Barramundi
Answer: a) Clownfish
36. Which of the following fish is considered a scavenger?
a) Catfish
b) Mackerel
c) Tilapia
d) Tuna
Answer: a) Catfish
37. Which enzyme helps fish digest proteins?
a) Amylase
b) Protease
c) Lipase
d) Cellulase
Answer: b) Protease
38. Which factor determines the sex of many fish species?
a) Water temperature
b) Salinity
c) pH level
d) Food availability
Answer: a) Water temperature
39. What is the main function of the caudal fin in fish?
a) Steering
b) Propulsion
c) Balancing
d) Digestion
Answer: b) Propulsion
40. Which part of the fish helps detect changes in water pressure and movement?
a) Swim bladder
b) Lateral line
c) Gills
d) Scales
Answer: b) Lateral line
Fisheries Management & Conservation MCQs
41. Which type of fishery involves catching wild fish from natural water bodies?
a) Inland fishery
b) Capture fishery
c) Culture fishery
d) Marine fishery
Answer: b) Capture fishery
42. What is the primary goal of fisheries management?
a) Maximizing profit
b) Conserving fish populations
c) Increasing fish size
d) Reducing fishing equipment costs
Answer: b) Conserving fish populations
43. Which of the following is a common method to prevent overfishing?
a) Using larger nets
b) Reducing the number of boats
c) Implementing catch quotas
d) Fishing in deeper waters
Answer: c) Implementing catch quotas
44. Which organization is responsible for global fisheries management?
a) FAO
b) WHO
c) UNESCO
d) WWF
Answer: a) FAO (Food and Agriculture Organization)
45. What is the purpose of a marine protected area (MPA)?
a) To increase tourism
b) To allow fish stocks to recover
c) To restrict boat movement
d) To promote deep-sea mining
Answer: b) To allow fish stocks to recover
46. Which method is used to estimate fish populations in a water body?
a) Electro-fishing
b) Radiotelemetry
c) Mark and recapture
d) Sonar mapping
Answer: c) Mark and recapture
47. Which type of pollution poses the biggest threat to fisheries?
a) Noise pollution
b) Plastic pollution
c) Light pollution
d) Air pollution
Answer: b) Plastic pollution
48. Which human activity significantly affects coral reef fisheries?
a) Deforestation
b) Industrial fishing
c) Oil drilling
d) All of the above
Answer: d) All of the above
49. What is the main cause of fish kills in polluted water bodies?
a) Low oxygen levels
b) High salt content
c) Overpopulation of fish
d) Increased water flow
Answer: a) Low oxygen levels
50. Which of the following is a sustainable fishing practice?
a) Using small-mesh nets
b) Catch and release
c) Overharvesting
d) Dynamite fishing
Answer: b) Catch and release
Aquaculture & Fish Farming MCQs
51. Which country is the largest producer of farmed fish?
a) India
b) USA
c) China
d) Norway
Answer: c) China
52. Which type of aquaculture involves fish farming along with rice cultivation?
a) Cage culture
b) Monoculture
c) Integrated rice-fish farming
d) Brackish water aquaculture
Answer: c) Integrated rice-fish farming
53. Which type of fish farming system has the highest production efficiency?
a) Extensive farming
b) Intensive farming
c) Semi-intensive farming
d) Capture fisheries
Answer: b) Intensive farming
54. Which of the following is an example of a herbivorous fish?
a) Catfish
b) Tilapia
c) Tuna
d) Barracuda
Answer: b) Tilapia
55. Which fish species is mainly cultured for its caviar?
a) Salmon
b) Sturgeon
c) Tilapia
d) Trout
Answer: b) Sturgeon
56. Which fish is known as "the poor man’s fish" due to its affordability and wide consumption?
a) Tilapia
b) Tuna
c) Barramundi
d) Salmon
Answer: a) Tilapia
57. Which type of fish culture is practiced in saltwater ponds or coastal areas?
a) Brackish water aquaculture
b) Freshwater aquaculture
c) Marine aquaculture
d) Open-sea farming
Answer: a) Brackish water aquaculture
58. Which of the following is NOT a major challenge in aquaculture?
a) Disease outbreaks
b) Oxygen depletion
c) High land requirements
d) Genetic modification
Answer: d) Genetic modification
59. What is the major waste product excreted by fish in aquaculture systems?
a) Urea
b) Ammonia
c) Nitrate
d) Phosphate
Answer: b) Ammonia
60. Which of the following improves oxygen
availability in fish ponds?
a) Adding organic matter
b) Aeration
c) Increasing fish density
d) Reducing water change frequency
Answer: b) Aeration
Fish Taxonomy & Classification MCQs
61. Which class do bony fishes belong to?
a) Chondrichthyes
b) Osteichthyes
c) Cyclostomata
d) Agnatha
Answer: b) Osteichthyes
62. Which of the following is a cartilaginous fish?
a) Rohu
b) Tuna
c) Shark
d) Tilapia
Answer: c) Shark
63. Which order does Catla (Catla catla) belong to?
a) Perciformes
b) Cypriniformes
c) Siluriformes
d) Clupeiformes
Answer: b) Cypriniformes
64. Which of the following is an example of a deep-sea fish?
a) Lanternfish
b) Rohu
c) Carp
d) Guppy
Answer: a) Lanternfish
65. What is the scientific name of the European eel?
a) Anguilla anguilla
b) Clarias batrachus
c) Labeo rohita
d) Pangasius pangasius
Answer: a) Anguilla anguilla
66. Which family do carps belong to?
a) Clupeidae
b) Cichlidae
c) Cyprinidae
d) Siluridae
Answer: c) Cyprinidae
67. Which fish is known as the "King of Fishes"?
a) Tuna
b) Salmon
c) Hilsa
d) Barramundi
Answer: c) Hilsa
68. Which of the following is a jawless fish?
a) Lamprey
b) Barracuda
c) Eel
d) Pufferfish
Answer: a) Lamprey
69. Which order does the Tilapia fish belong to?
a) Cypriniformes
b) Perciformes
c) Siluriformes
d) Salmoniformes
Answer: b) Perciformes
70. Which of the following fish is famous for its bioluminescence?
a) Lanternfish
b) Goldfish
c) Betta fish
d) Rohu
Answer: a) Lanternfish
Fisheries Science & Technology MCQs
71. Which chemical is commonly used for fish anesthesia?
a) MS-222 (Tricaine Methanesulfonate)
b) Potassium permanganate
c) Formalin
d) Ammonium nitrate
Answer: a) MS-222 (Tricaine Methanesulfonate)
72. Which type of fish processing technique is used to extend shelf life by removing moisture?
a) Freezing
b) Canning
c) Drying
d) Smoking
Answer: c) Drying
73. Which of the following is used to detect fish in water bodies?
a) SONAR
b) RADAR
c) GPS
d) Microscope
Answer: a) SONAR
74. Which gas is mainly responsible for off-flavor in fish ponds?
a) Oxygen
b) Hydrogen sulfide
c) Nitrogen
d) Carbon dioxide
Answer: b) Hydrogen sulfide
75. Which is the most common method of fish preservation?
a) Salting
b) Sun-drying
c) Freezing
d) Smoking
Answer: c) Freezing
76. Which factor is most important in determining fish spoilage rate?
a) Temperature
b) Fish size
c) Oxygen concentration
d) Light intensity
Answer: a) Temperature
77. Which chemical is used for fish disease treatment in aquaculture?
a) Copper sulfate
b) Sodium chloride
c) Both a and b
d) None of the above
Answer: c) Both a and b
78. Which equipment is used to measure dissolved oxygen in fish ponds?
a) pH meter
b) DO meter
c) Secchi disk
d) Thermometer
Answer: b) DO meter
79. Which fish species is commonly used in bioremediation of polluted waters?
a) Catfish
b) Tilapia
c) Salmon
d) Tuna
Answer: b) Tilapia
80. What is the process of removing unwanted fish from a pond called?
a) Sorting
b) Harvesting
c) Eradication
d) Culling
Answer: d) Culling
Fisheries Economics & Trade MCQs
81. Which country is the leading exporter of shrimp?
a) Thailand
b) India
c) Vietnam
d) China
Answer: b) India
82. Which organization sets international standards for fish trade?
a) WHO
b) FAO
c) WTO
d) IUCN
Answer: b) FAO
83. Which fish product has the highest market value?
a) Dried fish
b) Caviar
c) Fish meal
d) Fish oil
Answer: b) Caviar
84. Which species is most commonly used for fish meal production?
a) Anchovy
b) Salmon
c) Tuna
d) Carp
Answer: a) Anchovy
85. What is the primary use of fish meal in aquaculture?
a) Fertilizer
b) Livestock feed
c) Human consumption
d) Fuel
Answer: b) Livestock feed
86. Which of the following is a major constraint in fisheries development?
a) Overfishing
b) Disease outbreaks
c) Climate change
d) All of the above
Answer: d) All of the above
87. Which of the following is an example of value-added fishery products?
a) Frozen fish fillets
b) Fresh fish
c) Live fish
d) Whole fish
Answer: a) Frozen fish fillets
88. Which sector consumes the highest proportion of captured fish?
a) Human consumption
b) Animal feed
c) Industrial processing
d) Fertilizer production
Answer: a) Human consumption
89. Which factor influences the demand for fish products the most?
a) Market price
b) Weather conditions
c) Fish length
d) Fishing technique
Answer: a) Market price
90. Which of the following is a major export product of the Indian fisheries sector?
a) Lobster
b) Shrimp
c) Catfish
d) Carp
Answer: b) Shrimp
Fish Anatomy & Physiology MCQs
91. Which organ in fish is responsible for osmoregulation?
a) Liver
b) Kidney
c) Heart
d) Swim bladder
Answer: b) Kidney
92. What is the primary function of gill rakers in fish?
a) Oxygen absorption
b) Trapping food particles
c) Blood circulation
d) Excretion
Answer: b) Trapping food particles
93. Which type of muscle is responsible for the fast swimming bursts in fish?
a) White muscle
b) Red muscle
c) Smooth muscle
d) Cardiac muscle
Answer: a) White muscle
94. What is the function of the swim bladder in fish?
a) Oxygen exchange
b) Buoyancy control
c) Food digestion
d) Water filtration
Answer: b) Buoyancy control
95. Which fish structure is homologous to the lungs in mammals?
a) Swim bladder
b) Kidney
c) Heart
d) Liver
Answer: a) Swim bladder
96. What type of circulatory system do fish have?
a) Open circulatory system
b) Closed circulatory system
c) Dual circulatory system
d) None of the above
Answer: b) Closed circulatory system
97. What is the primary function of fish scales?
a) Gas exchange
b) Protection against predators and infections
c) Digestion
d) Waste excretion
Answer: b) Protection against predators and infections
98. Which of the following fish has the highest oxygen demand?
a) Catfish
b) Trout
c) Carp
d) Tilapia
Answer: b) Trout
99. What is the function of the lateral line system in fish?
a) Vision
b) Detecting vibrations in water
c) Buoyancy control
d) Digestion
Answer: b) Detecting vibrations in water
100. Which part of the fish brain controls movement and balance?
a) Cerebrum
b) Cerebellum
c) Medulla oblongata
d) Optic lobes
Answer: b) Cerebellum
Fish Reproduction & Development MCQs
101. Which term describes fish that lay eggs outside their body?
a) Oviparous
b) Viviparous
c) Ovoviviparous
d) Hermaphroditic
Answer: a) Oviparous
102. Which hormone plays a crucial role in fish spawning?
a) Insulin
b) Prolactin
c) Gonadotropin
d) Thyroxine
Answer: c) Gonadotropin
103. Which of the following fish exhibits parental care?
a) Tilapia
b) Tuna
c) Rohu
d) Sardine
Answer: a) Tilapia
104. Which term describes fish that give birth to live young?
a) Oviparous
b) Viviparous
c) Ovoviviparous
d) Parthenogenetic
Answer: b) Viviparous
105. Which of the following fish reproduces through parthenogenesis?
a) Guppy
b) Stickleback
c) Amazon molly
d) Trout
Answer: c) Amazon molly
106. What is the primary factor that triggers fish spawning in the wild?
a) Water temperature
b) Salinity
c) Oxygen level
d) Sunlight
Answer: a) Water temperature
107. Which of the following fish is a mouthbrooder?
a) Catfish
b) Tilapia
c) Rohu
d) Tuna
Answer: b) Tilapia
108. Which type of fertilization occurs in most bony fishes?
a) Internal
b) External
c) Both internal and external
d) Asexual
Answer: b) External
109. What is the term for newly hatched fish that still have their yolk sac attached?
a) Fry
b) Larvae
c) Fingerling
d) Juvenile
Answer: b) Larvae
110. Which of the following is an example of a hermaphroditic fish?
a) Clownfish
b) Catfish
c) Rohu
d) Tuna
Answer: a) Clownfish
Fisheries & Aquaculture Management MCQs
111. Which type of fish farming system involves raising fish in floating cages?
a) Pond culture
b) Cage culture
c) Raceway culture
d) Integrated culture
Answer: b) Cage culture
112. Which is a major cause of fish diseases in aquaculture?
a) High oxygen levels
b) Overcrowding
c) Proper waste management
d) Low nutrient levels
Answer: b) Overcrowding
113. Which of the following is an example of polyculture?
a) Raising only catfish
b) Raising catfish and tilapia together
c) Growing shrimp in freshwater
d) Raising fish in closed systems
Answer: b) Raising catfish and tilapia together
114. Which fish species is most commonly used for biofloc aquaculture?
a) Tilapia
b) Rohu
c) Tuna
d) Carp
Answer: a) Tilapia
115. Which disease is caused by bacterial infection in fish?
a) White spot disease
b) Columnaris
c) Swim bladder disorder
d) Fin rot
Answer: b) Columnaris
116. Which chemical is used to treat fungal infections in fish?
a) Copper sulfate
b) Potassium permanganate
c) Formalin
d) All of the above
Answer: d) All of the above
117. Which of the following is a sustainable aquaculture practice?
a) Using antibiotics excessively
b) Reducing stocking density
c) Overstocking fish ponds
d) Feeding fish with low-quality feed
Answer: b) Reducing stocking density
118. Which of the following is a major predator of fish in aquaculture systems?
a) Frogs
b) Birds
c) Snakes
d) All of the above
Answer: d) All of the above
119. Which method is used to measure water transparency in fish ponds?
a) DO meter
b) Secchi disk
c) Spectrophotometer
d) GPS
Answer: b) Secchi disk
120. What is the major
P cause of algal blooms in fish ponds?
a) High oxygen levels
b) Excess nutrients (Eutrophication)
c) Overfishing
d) Low pH
Answer: b) Excess nutrients (Eutrophication)
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