Which marine reptile is known for migrating between feeding and nesting grounds across the Pacific?
Answer
Leatherback sea turtle
98 Marine Biology And Ocean Life Trivia Questions with Answers
98 public questions with answers, drawn from the well. How many can you answer?
Which ocean animal has three hearts and blue blood?
Answer
Octopus
What is the world’s largest seagrass species?
Answer
Posidonia australis
Which sea bird can dive deeper than any other bird?
Answer
Emperor penguin
Which marine mammal is the world's smallest cetacean?
Answer
Vaquita
What is the largest living species of sea turtle by average adult mass?
Answer
Leatherback sea turtle
What structure do sharks use to detect weak electrical signals from prey?
Answer
Ampullae of Lorenzini
What is the name of the male seahorse's pouch where embryos develop?
Answer
Brood pouch
Which shark is widely regarded as the fastest swimmer?
Answer
Shortfin mako shark
Which ray species is the largest in the world by body size?
Answer
Oceanic manta ray
Which marine mammal has tusks in both males and females?
Answer
Walrus
Which ocean current flows around Antarctica without being blocked by continents?
Answer
Antarctic Circumpolar Current
Which fish lives at the greatest known ocean depths?
Answer
Hadal snailfish
Which jellyfish is famous for having the longest tentacles of any jellyfish?
Answer
Lion's mane jellyfish
Which living bivalve is the world's largest?
Answer
Giant clam
Which marine mammal holds the record for the deepest confirmed dive?
Answer
Cuvier's beaked whale
Which penguin species is the tallest and heaviest living penguin?
Answer
Emperor penguin
Which marine animal is known for producing the loudest sound of any animal?
Answer
Sperm whale
What defensive organ can some sea cucumbers eject when attacked?
Answer
Cuvierian tubules
What copper-based pigment makes horseshoe crab blood appear blue?
Answer
Hemocyanin
Which living marine mammal has the densest fur?
Answer
Sea otter
Which crustacean is the largest living arthropod by leg span?
Answer
Japanese spider crab
What pigment makes many flamingos pink after they eat algae and crustaceans?
Answer
Carotenoids
Which marine mammal has the thickest blubber, reaching about 50 centimetres?
Answer
Bowhead whale
Which marine reptile is the largest living turtle?
Answer
Leatherback sea turtle
Which whale is famous for using bubble nets to concentrate prey?
Answer
Humpback whale
Which fish is the heaviest living bony fish?
Answer
Ocean sunfish
How fast can a peacock mantis shrimp's striking appendage move?
Answer
About 23 metres per second
What type of colonial animal is a Portuguese man o' war?
Answer
Siphonophore
What is the largest living species of sea star?
Answer
Sunflower sea star
Which shark is recognized as the longest-lived vertebrate known to science?
Answer
Greenland shark
A narwhal's tusk is what anatomical structure?
Answer
An elongated tooth
Which reptile is found naturally only in the Galápagos Islands and feeds in the sea?
Answer
Marine iguana
What toxin gives the blue-ringed octopus its dangerous bite?
Answer
Tetrodotoxin
Which deep-sea fish has a transparent head and tubular eyes that point upward?
Answer
Barreleye fish
What natural material forms the hard shells of most mollusks such as clams and oysters?
Answer
Calcium carbonate
What process allows corals with algae to produce much of their food using sunlight?
Answer
Photosynthesis
What is the only fish known to fly by gliding above the ocean surface?
Answer
Flying fish
Which marine animal is the world's largest fish?
Answer
Whale shark