Ocean 115 - Introduction to Oceanography » Spring 2022 » Open Ocean

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Question #1
When do striped marlins mainly hunt?
A.   In daylight
B.   At night
C.   Anytime
D.   At dusk
Question #2
What happens to the sardines the marlins were hunting?
A.   They escape
B.   The marlins eat them all
C.   They scare them off using the ball defense
D.   They are swallowed by a whale
Question #3
What do the manta rays feed on?
A.   Sharks
B.   Fish
C.   Shrimp
D.   Eggs
Question #4
How many tuna eggs reach adulthood?
A.   1 in 10
B.   1 in 1000
C.   1 in 1 million
D.   1 in 100 million
E.   1 in 100,000
Question #5
What is the use of the sail on the sailfish?
A.   To increase its speed
B.   To find a mate
C.   To light up blue and ultraviolet when hunting
D.   To ward off predators
Question #6
How can fish find shelter in the open ocean?
A.   By swimming under large ships
B.   By finding floating debris
C.   They actually can’t
D.   By mimicking larger fish and staying in one large group
Question #7
What is a seamount?
A.   A depression off the coast
B.   A submerged island
C.   A shimmer in the ocean
D.   A type of coral
E.   A crater from an underwater volcano
Question #8
Why are seamounts important for marine biologists?
A.   They have magnetic signals that pull in sharks
B.   They allow better navigation
C.   They are the only place we can find jacks
D.   They bring up nutrients from the deep sea by deflecting the deep water currents up to the surface
Question #9
Why do the hammerhead sharks come to the volcanic islands?
A.   To hunt for squid
B.   To find cleaners to remove parasites
C.   To eat silky sharks
D.   To eat reef fish
Question #10
What is the ball defense?
A.   A tight circle and quick breakup in all directions to confuse predators
B.   A tight circle used by small fish to try to avoid being eaten
C.   A rolling attack strategy
D.   A trick that jacks use to confuse sharks
Question #11
How can the tuna break through the ball?
A.   By using speed to splinter the smaller fish into smaller groups
B.   By swallowing large numbers making the ball break
C.   By eating a path
D.   They can’t, the ball scares off predators by its size
Question #12
What do the tuna follow?
A.   Mako sharks
B.   Dolphins
C.   Tiger sharks
D.   Sturgeon
E.   Jacks
Question #13
Who drive the dolphin away from the bate ball?
A.   Bluefin tuna
B.   Cory's Shearwater
C.   Great White sharks
D.   Humpback whales

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