In marine biology, which bivalve is the largest living species by mass?
Answer
Giant clam
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 whale is known for the deepest recorded dive by a mammal?
Answer
Cuvier's beaked whale
Which fish is widely called the most venomous fish in the world?
Answer
Stonefish
Which cephalopod is known for changing color and texture to mimic a sea snake?
Answer
Mimic octopus
Which shark is known for using its fins to walk across the seafloor?
Answer
Epaulette shark
Which whale is famous for catching fish with bubble-net feeding?
Answer
Humpback whale
Which tiny marine snail is commonly called the sea butterfly?
Answer
Pteropod
What is the approximate average salinity of open-ocean seawater?
Answer
35 parts per thousand
What defensive behavior lets some sea cucumbers expel internal organs?
Answer
Evisceration
Which giant tube worm lives around deep-sea hydrothermal vents without a digestive tract?
Answer
Riftia pachyptila
In bony fish, what sensory system detects water movement along the body?
Answer
Lateral line system
In baleen whales, what comb-like structures filter food from seawater?
Answer
Baleen plates
Which ocean zone receives enough sunlight for most marine photosynthesis?
Answer
Photic zone
What is the world’s largest fish by body mass?
Answer
Whale shark
What is the largest species of penguin, measured by height and mass?
Answer
Emperor penguin
What pigment gives many red algae their characteristic red or purplish color?
Answer
Phycoerythrin
In sea stars, what is the free-swimming larval stage called?
Answer
Bipinnaria
What is the ocean layer found deeper than about 6,000 metres called?
Answer
Hadal zone
Which reef system is the world's largest structure built by living organisms?
Answer
Great Barrier Reef
Which animal is the largest invertebrate ever recorded by mass?
Answer
Colossal squid
Which ocean current circles Antarctica without meeting a continent?
Answer
Antarctic Circumpolar Current
What structure do sea urchins use to scrape algae from rocks?
Answer
Aristotle's lantern
Which marine reptile is the only seagoing lizard?
Answer
Marine iguana
What is the deepest known point in the ocean called?
Answer
Challenger Deep
Which marine animal has the largest brain by mass?
Answer
Sperm whale
Which fish is famous for inflating its body when threatened?
Answer
Pufferfish
What is the largest species of shark by total length?
Answer
Whale shark
Which animal is often called the Portuguese man o' war but is not a true jellyfish?
Answer
Physalia physalis
What body system lets sea stars move using hundreds of tiny tube feet?
Answer
Water vascular system
What is the narwhal's famous tusk actually made from?
Answer
An elongated tooth
What is the main mineral component of most mollusc shells?
Answer
Calcium carbonate
What process causes corals to lose their symbiotic algae during severe heat stress?
Answer
Coral bleaching
In sea turtles, what environmental factor commonly determines hatchling sex?
Answer
Incubation temperature
What process lets dolphins locate objects using reflected clicks?
Answer
Echolocation
What ecological role does the sea otter famously play in kelp forests?
Answer
Keystone predator
Which sea turtle is the fastest swimmer?
Answer
Leatherback sea turtle
Which whale is the largest toothed whale?
Answer
Sperm whale
Which ocean habitat is formed by dense underwater forests of kelp?
Answer
Kelp forest
What is the name of the light-producing organ in many deep-sea animals?
Answer
Photophore