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

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