Which marine mammal holds the record for the deepest recorded dive, reaching nearly 3,000 metres?
Answer
Cuvier's beaked whale
98 Ocean Life Trivia Questions with Answers
98 public questions with answers, drawn from the well. How many can you answer?
Which bivalve is the largest living mollusc, reaching more than 1 metre across?
Answer
Giant clam (Tridacna gigas)
Which animal is the largest known animal in Earth’s history?
Answer
Blue whale
Which bird is the deepest-diving bird species?
Answer
Emperor penguin
Which toothed whale is the largest member of its group?
Answer
Sperm whale
Which marine reptile is the only sea turtle that regularly eats seagrass and algae as an adult?
Answer
Green sea turtle
Which ocean current is the largest warm-water current in the Atlantic Ocean?
Answer
Gulf Stream
Which sea turtle species has the largest body and lacks a hard bony shell?
Answer
Leatherback sea turtle
Which ocean process creates new seafloor at mid-ocean ridges?
Answer
Seafloor spreading
What is the main structural mineral in the shells of most mollusks?
Answer
Calcium carbonate
Which marine invertebrate is commonly called the vampire squid?
Answer
Vampire squid
Which shark is famous for its jaws that can extend outward to seize prey?
Answer
Goblin shark
In clownfish, which sex change commonly occurs when the dominant female dies?
Answer
Male to female
Which fish has a transparent, fluid-filled head that reveals its tubular eyes?
Answer
Barreleye fish
What is the smallest baleen whale species, according to modern scientific classification?
Answer
Pygmy right whale
Which fish can produce up to about 300 million eggs in a single spawning season?
Answer
Ocean sunfish
Which microscopic ocean organism produces much of the oxygen in Earth’s atmosphere?
Answer
Phytoplankton
Which animal is the longest-lived vertebrate known to science?
Answer
Greenland shark
Which fish is known for walking on the seafloor with its pectoral fins?
Answer
Red-lipped batfish
Which octopus is famous for imitating lionfish, flatfish and sea snakes?
Answer
Mimic octopus
Which jellyfish is the largest known jellyfish species?
Answer
Lion’s mane jellyfish
Which whale has a single long tusk that can exceed 3 metres?
Answer
Narwhal
What is the world’s smallest cetacean?
Answer
Vaquita
Which marine mammal is the largest member of the weasel family?
Answer
Sea otter
Which shark is recognized as the only known omnivorous shark species?
Answer
Bonnethead shark
Which shark species is known for embryos eating their siblings before birth?
Answer
Sand tiger shark
Which whale is famous for using bubble-net feeding to concentrate schools of fish?
Answer
Humpback whale
Which shark is known for glowing photophores on its underside?
Answer
Cookiecutter shark
Which marine animal has a shell divided into camera-like chambers?
Answer
Chambered nautilus
Which whale has the longest baleen plates?
Answer
Bowhead whale
Which fish is famous for producing electricity with its tail?
Answer
Electric eel