Marine Biology Trivia Questions
Total Questions: 89
In the Anableps fish, which organ is divided into two corneas and two retinas?
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eye
What type of 'equine' fish has males that care for the eggs in an abdominal pouch until they hatch?
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seahorse
Which 10-armed mollusk can range in size from a couple of inches to more than 55 feet?
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squid
What long, prehensile body part does a sea horse use to cling to seaweed?
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tail
What type of edible seaweed seen at low tide grows up to 10 feet long on the Atlantic coast?
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kelp
Every shark has at least one dorsal fin and one fin that is better known by what common name?
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tail
What animal's name originates from two Greek words meaning 'eight feet'?
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octopus
What 10-armed marine animal species is the largest invertebrate and can reach lengths of more than 50 feet?
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squid
What do you call one of the eight flexible arms of an octopus?
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tentacle
Which echinoderm, often found in tide pools, turns its stomach inside out to eat?
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starfish
What marine organism can develop into a reef-building colony from a single entity?
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coral
What is the fierce ocean fish whose name comes from the word 'barraco,' meaning 'protruding tooth'?
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barracuda
What fish, which rhyme with scrod, are usually sold as scrod along with young haddock?
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cod
What spineless sea creatures are collectively known as a 'smack'?
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jellyfish
What type of shellfish are the Dungeness and Alaska king varieties popular on the West Coast?
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crab
What is the name of the porous animal that includes types such as red-beard and bath?
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sponge
What is the specific term for the scientific study of seashells?
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conchology
Which animals use blubber and tufts at the base of their densely packed feathers to stay warm while diving?
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penguins
What food-producing substance is found in some tiny organisms called flagellates, similar to green plants?
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chlorophyll
What term is loosely applied to any small fish and also refers to the 2- to 4-foot Colorado squawfish?
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minnow
Kelp, known as the largest seaweed, is what type of primitive plant?
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algae
What is the name of the small shrimp-like animal whose name comes from the Norwegian word for 'young of fish' and lives on plankton?
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krill
Which mammal has baleen types with 2 nostrils and toothed types with a single blowhole?
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whale
Which fish's Pacific types die after spawning, while many of its Atlantic types do not?
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salmon
Which aquatic creature, known for its giant spider variety, can have claws that extend up to 10 feet apart?
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crab
What spiny, 5-armed sea creature has the ability to regenerate if cut in half?
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starfish
What is the only living cephalopod with an external chambered shell?
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nautilus
What color remains on a lobster's shell after it is cooked because the heat breaks down the pigments?
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red
What substance makes up almost 99% of a jellyfish's body?
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water
Which invertebrate, a relative of the squid, is known to have the most highly developed brain?
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octopus
Which type of tuna has the whitest meat and a flavor similar to chicken?
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albacore
What sea creature, a relative of the octopus, is sometimes referred to as a sea arrow?
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squid
What bivalve's quahog variety shell was used as wampum by the Indians?
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clam
What minute organisms are referred to by a Greek word meaning 'wandering' and are known as the pasture of the seas?
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plankton
Which type of animal does the loggerhead come ashore to lay its eggs?
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turtle
What is the name of the mollusk that is also called a devilfish and can inject a poison to paralyze its prey?
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octopus
What light emitting process in fish is used for identifying gender and luring prey?
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bioluminescence
What type of fish is characterized by its long, driving tail fin and includes the thresher species?
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shark
What are the large brown seaweeds that were once burned to obtain potash for glassmaking?
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kelp
Most of these spiny animals in the class Asteroidea have 5 arms, but some can have over 40 arms. What are they called?
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starfish
What material makes up a shark's skeleton instead of bones?
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cartilage
How many arms does an octopus have?
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8
What is the pinkish color associated with certain colony-forming polyps?
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coral
Which bivalve's largest known shell, weighing 734 pounds, was found off Okinawa in 1956?
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clam
What type of organ does the king crab use to breathe, characterized by its many 'leaves'?
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gill
What marine animals have flattish carapaces and limbs that have evolved into flippers?
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turtles
What type of fish includes species such as pink and coho?
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salmon
Which ocean-dwelling animal ejects a cloud of luminous ink to escape from predators?
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squid
What type of aquatic carnivore is known for using its long tail to herd and stun fish before eating them?
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shark
What stripe-patterned commercial fish is also known by the name skipjack?
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tuna
Which tusked marine mammal has air sacs in its neck that allow it to keep its head above water while sleeping?
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walrus
What is the circular type of coral reef that forms an island around a lagoon?
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atoll
Which mammal is capable of consuming 5,000 pounds of krill in a single day?
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whale
What type of marine animal has an ear-shaped shell ringed with holes that is sometimes used in making costume jewelry?
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abalone
Which oil-filled organ helps sharks stay buoyant since they lack a swim bladder?
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liver
What do baleen whales eat that is a mixture of microscopic organisms drifting near the surface of the sea?
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plankton
In the photic zone of the ocean, what process is supported by sufficient sunlight?
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photosynthesis
What is the name of the sea creatures that belong to the animal class Asteroidea?
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starfish
What type of fish is referred to as a smolt when it first migrates from fresh water to the sea?
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salmon
What dark fluid is secreted by cuttlefish and other cephalopods?
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ink
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