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

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