Did you know that some fish can live over 100 years? It’s true! But if you’re like most people, your knowledge of our fishy friends might be limited to the aquarium or dinner plate.

You want to impress your friends and family with amazing fish facts, but where do you start? Don’t worry; we’ve got you covered.

In this article, you’ll find 151+ fascinating and surprising fish trivia facts that will blow your mind and make you the star of your next trivia night.

From the bizarre to the brilliant, these facts will forever change how you think about fish.

Get ready to dive in and discover a new world beneath the waves!

Interesting Fish Trivia Questions & Answers

1. What is the largest species of fish?
   A: The whale shark, which can grow up to 60 feet long.

2. What is the smallest species of fish?
   A: The Paedocypris progenetica, which measures just 7.9 millimeters long.

3. Which fish is known for its ability to change its color to blend in with its surroundings?
   A: The chameleon fish, also known as the Hawaiian frogfish.

4. What is the fastest swimming fish?
   A: The sailfish, which can swim up to 68 miles per hour.

5. Which fish is known for its ability to walk on land using its pectoral fins?
   A: The mudskipper, which can survive out of water for up to several days.

6. What is the deepest-living species of fish?
   A: The Mariana snailfish, which has been found at depths of up to 26,200 feet.

7. Which fish is known for its ability to produce electricity?
   A: The electric eel, which can generate up to 600 volts of electricity.

8. What is the most venomous fish in the world?
   A: The stonefish, which has venomous spines that can cause severe pain and even death.

9. Which fish is known for its ability to fly out of the water?
   A: The flying fish, which can glide for distances of up to 650 feet.

10. What is the longest-living species of fish?
    A: The Greenland shark, which can live for over 400 years.

11. Which fish is known for its ability to regenerate lost body parts?
    A: The axolotl, which can regenerate its limbs, organs, and even parts of its brain.

12. What is the most expensive fish in the world?
    A: The bluefin tuna, which has sold for as much as $3.1 million at auction.

13. Which fish is known for its ability to change its sex?
    A: The clownfish, which can change from male to female if the dominant female in its group dies.

14. What is the most toxic fish in the world?
    A: The pufferfish, which contains a toxin called tetrodotoxin that is 1,200 times more poisonous than cyanide.

15. Which fish is known for its ability to swim backwards?
    A: The seahorse, which is the only fish that can swim vertically and backwards.

16. What is the largest freshwater fish in the world?
    A: The Mekong giant catfish, which can grow up to 9 feet long and weigh up to 646 pounds.

17. Which fish is known for its ability to survive in extremely cold temperatures?
    A: The Antarctic cod, which can survive in water temperatures as low as 28°F.

18. What is the most intelligent species of fish?
    A: The manta ray, which has the largest brain-to-body size ratio of any fish.

19. Which fish is known for its ability to survive out of water for extended periods of time?
    A: The lungfish, which can survive out of water for up to several years by burrowing into mud and entering a state of hibernation.

20. What is the most endangered species of fish?
    A: The red handfish, which is found only off the coast of Tasmania and has an estimated population of fewer than 100 individuals.

21. Which fish is known for its ability to camouflage itself as a rock or coral?
    A: The stonefish, which can blend in seamlessly with its surroundings to avoid detection by predators and prey.

22. What is the longest species of fish?
    A: The oarfish, which can grow up to 56 feet long.

23. Which fish is known for its ability to survive in extremely hot temperatures?
    A: The desert pupfish, which can survive in water temperatures up to 113°F.

24. What is the most social species of fish?
    A: The schooling fish, such as sardines and anchovies, which form large groups for protection and feeding.

25. Which fish is known for its ability to detect electrical fields?
    A: The shark, which uses special sensory organs called ampullae of Lorenzini to detect the electrical fields generated by the muscle contractions of its prey.

26. What is the most widely distributed species of fish?
    A: The minnow, which is found in freshwater habitats all over the world.

27. Which fish is known for its ability to hold its breath for extended periods of time?
    A: The goldfish, which can survive without oxygen for up to five months by converting lactic acid into alcohol.

28. What is the most colorful species of fish?
    A: The mandarin fish, which has a vibrant blue, orange, and green coloration.

29. Which fish is known for its ability to navigate using the Earth’s magnetic field?
    A: The salmon, which uses magnetic navigation to find its way back to its birthplace to spawn.

30. What is the most commercially important species of fish?
    A: The Atlantic cod, which has been a staple of the fishing industry for centuries.

31. Which fish is known for its ability to survive in extremely acidic water?
    A: The Osorezan dace, which can survive in water with a pH as low as 3.5.

32. What is the most venomous freshwater fish in the world?
    A: The stonefish, which is not only the most venomous fish in the ocean but also in freshwater habitats.

33. Which fish is known for its ability to survive in extremely alkaline water?
    A: The Magadi tilapia, which can survive in water with a pH as high as 10.5.

34. What is the most aggressive species of fish?
    A: The red-bellied piranha, which has a reputation for attacking and feeding on larger animals in packs.

35. Which fish is known for its ability to survive in extremely low oxygen environments?
    A: The crucian carp, which can survive in water with oxygen levels as low as 0.1 mg/l by producing alcohol as a byproduct of anaerobic respiration.

36. What is the most intelligent freshwater fish?
    A: The African cichlid, which has been shown to use tools and exhibit complex social behaviors.

37. Which fish is known for its ability to survive in extremely high pressure environments?
    A: The marlin, which can dive to depths of over 3,000 feet where the pressure is over 1,000 times greater than at the surface.

38. What is the most endangered freshwater fish in the world?
    A: The Devils Hole pupfish, which is found only in a single cave in Nevada and has a population of fewer than 200 individuals.

39. Which fish is known for its ability to survive without food for extended periods of time?
    A: The African lungfish, which can survive without food for up to three years by entering a state of hibernation.

40. What is the most popular aquarium fish in the world?
    A: The neon tetra, which is a small, colorful fish that is easy to care for and widely available.

41. Which fish is known for its ability to change its color to communicate with other fish?
    A: The Caribbean reef squid, which can rapidly change its color and pattern to communicate with other squid and avoid predators.

42. What is the most expensive aquarium fish in the world?
    A: The platinum arowana, which can sell for as much as $400,000.

43. Which fish is known for its ability to survive in extremely salty water?
    A: The Tilapia of the genus Oreochromis, which can survive in water with salinity levels up to four times that of seawater.

44. What is the most popular game fish in the world?
    A: The largemouth bass, prized by anglers for its fighting ability and popularity in fishing tournaments.

45. Which fish is known for its ability to survive in extremely turbid water?
    A: The candiru, which is a small catfish that is adapted to living in the muddy waters of the Amazon River basin.

46. What is the most common species of fish in the world?
    A: The bristlemouth, which is a small, deep-sea fish that is estimated to have a global population in the trillions.

47. Which fish is known for its ability to survive in extremely polluted water?
    A: The gulf killifish, which can survive in water with high levels of pollutants such as oil and heavy metals.

48. What is the most popular food fish in the world?
    A: The tilapia, which is widely farmed and consumed for its mild flavor and low cost.

49. Which fish is known for its ability to create its own light?
    A: The lanternfish, which uses bioluminescence to attract prey and avoid predators in the deep sea.

50. What is the most dangerous freshwater fish in the world?
    A: The candiru, which is known to enter the urethras of humans and other mammals, causing severe pain and potentially fatal infections.

51. Which fish is known for its ability to survive in extremely deep water?
    A: The Mariana snailfish, which has been found at depths of over 26,000 feet.

52. What is the most popular sushi fish in the world?
    A: The bluefin tuna, which is prized for its rich, fatty flavor and texture.

53. Which fish is known for its ability to survive in extremely shallow water?
    A: The mudskipper, which can survive in water as shallow as a few centimeters deep by using its fins to move on land.

54. What is the most intelligent species of shark?
    A: The great white shark, which has a brain-to-body mass ratio similar to that of mammals and birds.

55. Which fish is known for its ability to survive in extremely murky water?
    A: The electric eel, which uses its electric sense to navigate and hunt in the dark, murky waters of the Amazon River basin.

56. What is the most popular sport fish in the world?
    A: The tarpon, which is sought after by anglers for its impressive size and fighting ability.

57. Which fish is known for its unique rectangular body shape?
    A: The sunfish, also known as the Mola mola.

58. What is the heaviest bony fish ever caught?
    A: The giant oceanic manta ray, with the heaviest recorded specimen weighing over 5,000 pounds.

59. Which species of fish has the longest known lifespan in the world?
    A: The Greenland shark, with some individuals estimated to be over 400 years old.

60. What is the national fish of Bangladesh?
    A: The Hilsa, a type of herring that is popular in South Asian cuisine.

61. Which fish is known for its ability to “walk” on the seafloor using its fins?
    A: The red-lipped batfish, found in the waters around the Galapagos Islands.

62. What is the most toxic fish in the world to humans?
    A: The pufferfish, which contains tetrodotoxin, a potent neurotoxin that can be fatal to humans in small doses.

63. Which species of fish is known for its unusual “unicorn” horn?
    A: The narwhal, a type of whale with a long, spiraled tusk that can grow up to 10 feet long.

64. What is the most widely distributed freshwater fish species in the world?
    A: The common carp, which can be found on every continent except Antarctica.

65. Which fish species is known for its bioluminescent “lure” used to attract prey?
    A: The anglerfish, which uses a specialized spine with a glowing tip to lure small fish into its mouth.

66. What is the smallest species of shark in the world?
    A: The dwarf lanternshark, which measures just 6-8 inches long when fully grown.

67. Which species of fish can survive being frozen solid in ice?
    A: The Antarctic toothfish, which produces antifreeze proteins to prevent ice crystals from forming in its body.

68. What is the most popular freshwater game fish in North America?
    A: The largemouth bass, prized by anglers for its fighting ability and popularity in fishing tournaments.

69. Which species of fish is known for its ability to “shoot” prey with jets of water?
    A: The archerfish, which can spit water up to 5 feet to knock insects and other small prey into the water.

70. What is the largest species of sturgeon in the world?
    A: The beluga sturgeon, which can grow up to 24 feet long and weigh over 3,000 pounds.

71. Which species of fish is known for its bright, iridescent scales that change color?
    A: The neon tetra, a popular aquarium fish native to the Amazon River basin.

72. What is the most expensive caviar in the world?
    A: Beluga caviar, which can sell for over $25,000 per kilogram.

73. Which species of fish is known for its ability to survive out of water for several days?
    A: The African lungfish, which can breathe air and survive in a state of estivation during dry periods.

74. What is the largest species of catfish in the world?
    A: The Mekong giant catfish, which can grow up to 9 feet long and weigh over 600 pounds.

75. Which species of fish is known for its unusual “pancake-like” shape?
    A: The hatchetfish, a deep-sea fish with a thin, laterally compressed body.

    

76. What is the most popular fish for fish and chips in the United Kingdom?
    A: The Atlantic cod, although other species like haddock and pollock are also commonly used.

77. Which species of fish can change its gender during its lifetime?
    A: The clownfish, which is born male but can change to female if the dominant female in its group dies.

78. What is the most endangered species of sturgeon in the world?
    A: The Chinese sturgeon, with an estimated wild population of less than 100 individuals.

79. Which species of fish is known for its ability to “fly” out of the water to escape predators?
    A: The flying fish, which can glide up to 650 feet using its large, wing-like fins.

80. What is the most widely consumed fish species in the world?
    A: The Alaska pollock, which is commonly used in processed foods like fish sticks and imitation crab meat.

81. Which species of fish is known for its venomous spines that can cause severe pain to humans?
    A: The lionfish, an invasive species in the Atlantic Ocean and Caribbean Sea.

82. What is the largest species of non-shark fish in the world?
    A: The ocean sunfish, which can grow up to 14 feet long and weigh over 5,000 pounds.

83. Which species of fish is known for its unusual “see-through” head?
    A: The barreleye fish, which has a transparent head that allows its eyes to rotate and look upward.

84. What is the most popular aquarium fish in the world?
    A: The guppy, a small, colorful fish that is easy to care for and breeds readily in captivity.

85. Which species of fish is known for its ability to survive in extremely cold waters?
    A: The Greenland shark, which can live in waters as cold as 28°F (-2°C).

86. What is the largest species of trout in the world?
    A: The Mongolian trout, which can grow up to 6 feet long and weigh over 200 pounds.

87. Which species of fish is known for its unusual “four-eyed” appearance?
    A: The four-eyed fish, which has two eyes that are divided into upper and lower halves, allowing it to see above and below the water’s surface.

88. What is the most endangered species of shark in the world?
    A: The Ganges shark, with an estimated population of fewer than 250 mature individuals.

89. Which species of fish is known for its ability to survive in extremely hot springs?
    A: The Devils Hole pupfish, which can live in water temperatures up to 93°F (34°C).

90. What is the largest species of pike in the world?
    A: The northern pike, which can grow up to 5 feet long and weigh over 60 pounds.

91. Which species of fish is known for its ability to survive in extremely acidic waters?
    A: The Osorezan dace, a small fish found in acidic volcanic lakes in Japan.

92. What is the most popular fish for sushi in Japan?
    A: The Japanese amberjack, also known as yellowtail or hamachi.

93. Which species of fish is known for its unusual “handstand” swimming position?
    A: The seahorse, which swims upright using its dorsal fin for propulsion.

94. What is the largest species of cichlid in the world?
    A: The giant cichlid, also known as the boulengerochromis microlepis, which can grow up to 3 feet long.

95. Which species of fish is known for its ability to survive in extremely low pH waters?
    A: The Danakil tilapia, which can live in waters with a pH as low as 2.5.

96. What is the most popular fish for fish tacos in Mexico?
    A: The Pacific sierra, also known as the Spanish mackerel.

97. Which species of fish is known for its unusual “backward” swimming style?
    A: The triggerfish, which can swim backwards by undulating its dorsal and anal fins.

98. What is the largest species of perch in the world?
    A: The Nile perch, which can grow up to 6 feet long and weigh over 400 pounds.

99. Which species of fish is known for its ability to survive in extremely high altitude lakes?
    A: The Himalayan snow trout, which can live in lakes up to 18,000 feet above sea level.

100. What is the most popular fish for fish stew in Brazil?
     A: The tambaqui, a large freshwater fish native to the Amazon River basin.

101. Which species of fish is known for its unusual “elongated” body shape?
     A: The hairtail, a type of cutlassfish known for its long, slender body.

102. What is the largest species of carp in the world?
     A: The Siamese giant carp, which can grow up to 9 feet long and weigh over 600 pounds.

103. Which species of fish is known for its ability to survive in extremely low light conditions?
     A: The Mexican blind cavefish, which has evolved to live in dark, underground caves with little to no light.

104. What is the most popular fish for fish and chips in New Zealand?
     A: The hoki, a type of hake that is widely exported and used in processed fish products.

105. Which species of fish is known for its unusual “suction” feeding mechanism?
     A: The sturgeon, which uses a vacuum-like mouth to suck up small fish and invertebrates from the bottom of rivers and lakes.

106. What is the largest species of anchovy in the world?
     A: The Peruvian anchovy, which can grow up to 8 inches long and is heavily fished for use in fish meal and oil.

107. Which species of fish is known for its ability to survive in extremely high salinity lakes?
     A: The Devils Hole pupfish, which lives in a highly saline pool in the Nevada desert.

108. What is the most popular fish for sashimi in Japan?
     A: The Japanese amberjack, also known as hamachi, which is prized for its rich, buttery flavor.

109. Which species of fish is known for its unusual “mimicry” abilities?
     A: The leaf-nosed lizardfish, which can change its color and pattern to blend in with surrounding vegetation.

110. What is the largest species of sole in the world?
     A: The Dover sole, which can grow up to 2 feet long and weigh up to 6 pounds.

111. Which species of fish is known for its ability to survive in extremely fast-flowing rivers?
     A: The golden mahseer, a type of carp that lives in the fast-flowing rivers of the Himalayas.

112. What is the most popular fish for fish balls in Southeast Asia?
     A: The snakehead, a freshwater fish known for its firm, white flesh.

113. Which species of fish is known for its unusual “lure” on its forehead?
     A: The warty frogfish, which uses a worm-like appendage on its head to attract prey.

114. What is the largest species of scorpionfish in the world?
     A: The giant scorpionfish, which can grow up to 3 feet long and weigh up to 40 pounds.

115. Which species of fish is known for its ability to survive in extremely low oxygen caves?
     A: The blind cave eel, which has evolved to live in caves with little to no oxygen.

116. What is the most popular fish for fish curry in Cambodia?
     A: The Mekong catfish, a large freshwater fish that is often used in spicy curries and soups.

117. Which species of fish is known for its unusual “transparent” skin?
     A: The crocodile icefish, which lacks scales and pigmentation, making its internal organs visible through its skin.

118. What is the largest species of herring in the world?
     A: The giant herring, also known as the king-of-the-salmon, which can grow up to 5 feet long.

119. Which species of fish is known for its ability to survive in extremely high pressure deep sea environments?
     A: The Mariana snailfish, which has been found at depths of over 26,000 feet in the Mariana Trench.

120. What is the most popular fish for fish head curry in Singapore?
     A: The red snapper, a type of reef fish that is often used in spicy curries and stews.

121. Which species of fish is known for its unusual “joint-hunting” behavior with octopuses?
     A: The rosy snapper, which has been observed hunting in cooperation with octopuses on coral reefs.

122. What is the largest species of mackerel in the world?
     A: The king mackerel, which can grow up to 5.5 feet long and weigh up to 100 pounds.

123. Which species of fish is known for its ability to survive in extremely high temperature geothermal pools?
     A: The Cyprinodon diabolis, a small pupfish that lives in hot springs in Mexico.

124. What is the most popular fish for fish and chips in South Africa?
     A: The kingklip, a type of cusk-eel that is often used in fish and chips and other fried fish dishes.

125. Which species of fish is known for its unusual “symbiotic” relationship with sea anemones?
     A: The clownfish, which gains protection from predators by living among the stinging tentacles of sea anemones.

126. What is the largest species of hagfish in the world?
     A: The goliath hagfish, which can grow up to 4 feet long and secrete large amounts of sticky slime.

127. Which species of fish is known for its ability to survive in extremely low temperature polar waters?
     A: The Arctic cod, which can live in waters as cold as 28°F (-2°C) near the North Pole.

128. What is the most popular fish for fish cutlets in India?
     A: The king fish, also known as the seer fish, which is often used in fried fish cutlets and other snacks.

129. Which species of fish is known for its unusual “cooperative” hunting behavior with moray eels?
     A: The grouper, which has been observed hunting in cooperation with moray eels on coral reefs.

130. What is the largest species of snapper in the world?
     A: The cubera snapper, which can grow up to 5 feet long and weigh up to 120 pounds.

131. Which species of fish is known for its ability to survive in extremely high conductivity waters?
     A: The Alcolapia alcalica, a small cichlid that lives in highly alkaline, high conductivity lakes in East Africa.

132. What is the most popular fish for fish sauce in Vietnam?
     A: The anchovy, which is fermented with salt to create a savory, umami-rich sauce used in many Vietnamese dishes.

133. Which species of fish is known for its unusual “bioluminescent” lure used for hunting?
     A: The black dragonfish, which uses a bioluminescent barbel to attract prey in the deep sea.

134. What is the largest species of goby in the world?
     A: The giant mudskipper, which can grow up to 2 feet long and is known for its ability to “walk” on land using its fins.

135. Which species of fish is known for its ability to survive in extremely hypersaline lakes?
     A: The Tilapia grahami, a small cichlid that lives in Lake Magadi, a highly saline lake in Kenya.

136. What is the most popular fish for fish noodle soup in Thailand?
     A: The striped snakehead, a freshwater fish that is often used in spicy noodle soups and curries.

137. Which species of fish is known for its unusual “symbiotic” relationship with cleaner shrimp?
     A: The moray eel, which allows cleaner shrimp to remove parasites and dead skin from its mouth and gills.

138. What is the largest species of smelt in the world?
     A: The capelin, a small fish that can grow up to 10 inches long and is an important food source for many marine animals.

139. Which species of fish is known for its ability to survive in extremely oxygen-poor waters?
     A: The crucian carp, which can survive for months in waters with little to no oxygen by producing alcohol as a byproduct.

140. What is the most popular fish for surimi (imitation crab meat) in Japan?
     A: The Alaska pollock, which is processed into a paste and flavored to resemble crab or other seafood.

141. Which species of fish is known for its unusual “cooperative” hunting behavior with dolphins?
     A: The yellowfin tuna, which has been observed hunting in cooperation with dolphins in the eastern Pacific Ocean.

142. What is the largest species of minnow in the world?
     A: The golden shiner, which can grow up to 12 inches long and is often used as bait for larger fish.

143. Which species of fish is known for its ability to survive in extremely hydrogen sulfide-rich waters?
     A: The Poecilia sulphuraria, a small livebearing fish that lives in sulfur springs in Mexico.

144. What is the most popular fish for fish and chips in Canada?
     A: The haddock, a type of cod that is often used in battered and fried fish dishes.

145. Which species of fish is known for its unusual “parasitic” relationship with larger fish?
     A: The cookiecutter shark, which takes circular bites out of larger fish and marine mammals using its saw-like teeth.

146. What is the largest species of pufferfish in the world?
     A: The giant pufferfish, which can grow up to 2 feet long and weigh up to 10 pounds.

147. Which species of fish is known for its ability to survive in extremely turbid, low-visibility waters?
     A: The Electric eel, which uses electrical signals to navigate and hunt in murky waters.

148. What is the most popular fish for gefilte fish in Jewish cuisine?
     A: The carp, which is ground and mixed with other ingredients to create a savory fish loaf.

149. Which species of fish is known for its unusual “mutualistic” relationship with anemonefish?
     A: The sea anemone, which provides shelter and protection for anemonefish in exchange for cleaning services.

150. What is the largest species of sardine in the world?
     A: The Pacific sardine, which can grow up to 12 inches long and is an important food source for many marine animals.

151. Which species of fish is known for its ability to survive in extremely low-nutrient waters?
     A: The bristlemouth, which is adapted to live in the nutrient-poor waters of the deep sea.

152. What is the most popular fish for sashimi in Korea?
     A: The flatfish, such as the Korean flounder or the spotted halibut, which are prized for their delicate flavor and texture.

Conclusion

In conclusion, the world of fish is endlessly interesting, with an incredible diversity of species adapted to survive in a wide range of environments.

From the tiniest minnows to the massive whale sharks, fish have developed a stunning range of colors, shapes, behaviors, and abilities.

 So the next time you find yourself near a body of water, take a moment to appreciate the incredible fish that call it home.

And if you’re hungry for more fishy facts, dive into the countless resources available online and in libraries to discover even more about these remarkable creatures.

The depths of fish knowledge are waiting for you to explore!