Which sea snail is the largest living gastropod?
Answer
Australian trumpet
98 Ocean Life Trivia Questions with Answers
98 public questions with answers, drawn from the well. How many can you answer?
Which marine animal is the largest member of the phylum Porifera?
Answer
Giant barrel sponge
What process determines whether many sea turtle hatchlings develop as male or female?
Answer
Temperature-dependent sex determination
What are the paired fleshy lobes beside a manta ray’s mouth called?
Answer
Cephalic fins
Which sea animal can eject some of its internal organs to deter predators?
Answer
Sea cucumber
How many eyes can a scallop have along the edge of its mantle?
Answer
Up to 200
Which lizard is the only modern species known to forage in the ocean?
Answer
Marine iguana
How many stomachs does a sea star have?
Answer
Two
What is the largest shark species in the ocean?
Answer
Whale shark
What is the deepest known fish habitat, where the Mariana snailfish has been observed?
Answer
The hadal zone
Which marine animal is the largest living bivalve mollusc?
Answer
Giant clam
What is the largest penguin species, according to the emperor penguin’s scientific record?
Answer
Emperor penguin
Which whale is the deepest-diving marine mammal?
Answer
Cuvier's beaked whale
Which fish is the largest living bony fish?
Answer
Ocean sunfish
Which marine animal is the fastest swimmer among penguins?
Answer
Gentoo penguin
Which crustacean is the largest living land arthropod?
Answer
Coconut crab
What body feature lets sharks detect weak electric fields in seawater?
Answer
Ampullae of Lorenzini
Which turtle can dive deeper than any other living sea turtle?
Answer
Leatherback sea turtle
What structure do corals build that supports one-quarter of marine species?
Answer
Coral reefs
Which marine animal has the largest brain of any animal?
Answer
Sperm whale
Which sea creature can change from male to female during its life?
Answer
Clownfish
Which jellyfish is often described as biologically immortal?
Answer
Turritopsis dohrnii
What toxin is found in the tissues of many pufferfish?
Answer
Tetrodotoxin
Which marine animal has the fastest punch in the animal kingdom?
Answer
Mantis shrimp
How many hearts does the giant Pacific octopus have?
Answer
Three
What is the scientific name of the giant squid?
Answer
Architeuthis dux
Which ray is the largest ray species in the world?
Answer
Oceanic manta ray
What type of organism is a Portuguese man o' war?
Answer
Siphonophore
Which ocean animal is famous for using rocks to open shellfish?
Answer
Sea otter
What substance makes lobster blood appear blue?
Answer
Hemocyanin
What is the largest species of sea turtle alive today?
Answer
Leatherback sea turtle
Which ocean animal has the largest eyes of any known animal?
Answer
Colossal squid
Which shark species is known for having the longest confirmed lifespan among vertebrates?
Answer
Greenland shark
What is the narwhal's long tusk actually made from?
Answer
An elongated tooth