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Sea Otter

Total questions: 68

Worksheet time: 34mins

Name
Class
Date
1.

What depth of water does the sea otter prefer?

a)

Shallow

b)

Deep

2.

How do sea otters contribute to the ecosystem?

a)

Control Herbivorous Invertebrates

b)

Prevent Overgrazing of Kelp

c)

Increase Marine Diversity

d)

Improve Water Quality

3.

What continents do sea otters inhabit?

a)

Asia

b)

North America

c)

Oceania

d)

South America

4.

What ocean does the sea otter inhabit?

a)

Pacific

b)

Atlantic

c)

Indian

d)

Arctic

5.

Sea otters are sexually dimorphic.

a)

True, males are larger.

b)

True, females are larger.

c)

False.

6.

How long is a sea otter's tail compared to its body?

a)

1x

b)

2x

c)

1/2x

d)

1/3x

7.

Sea otter pups can start diving at what age?

a)

Birth

b)

2 Weeks

c)

2 Months

d)

1 Year

8.

How deep can sea otters dive?

a)

45 m. / 148 ft.

b)

35 m. / 115 ft.

c)

25 m. / 82 ft.

d)

15 m. / 49 ft.

9.

How much fat is sea otter milk?

a)

20-25%

b)

10-15%

c)

30-35%

d)

40-45%

10.

When are sea otter pups weaned?

a)

6 Months

b)

1 Year

c)

1 Month

d)

3 Months

11.

Which sex of sea otter receives face scars from mating?

a)

Male

b)

Female

c)

Both, Male & Female

12.

What is the sea otter's mating system?

a)

Polygyny

b)

Monogamy

c)

Polyandry

d)

Polygynandry

13.

How many vocalizations do sea otters have?

a)

3

b)

6

c)

9

d)

12

14.

A sea otter's scent can deliver what information?

a)

Identity

b)

Age

c)

Sex

d)

Diet

15.

Why do sea otters wrap themselves in kelp?

a)

Prevent Drifting Away

b)

Regulate Body Temperature

c)

Keep Afloat

d)

Deter Predators

16.

When do sea otters rest on land?

a)

Stormy Weather

b)

High Population Density

c)

Sleeping

d)

Eating

17.

Sea otters reuse their tools.

a)

True

b)

False

18.

Sea otters are one of the few mammals that exhibit tool use.

a)

True

b)

False

19.

How does the sea otter use tools?

a)

Breaks Prey with Rocks

b)

Covers Face with Sponges

c)

Picks Crevices with Sticks

d)

Exfoliates with Tree Bark

20.

How many subspecies of sea otter are recognized?

a)

0

b)

2

c)

3

d)

5

21.

What is the largest subspecies of sea otter?

a)

Asian

b)

Northern

c)

Southern

d)

Western

22.

What is the sea otter's social system?

a)

Social

b)

Solitary

c)

Social Males, Solitary Females

d)

Solitary Males, Social Females

23.

What is a group of sea otters called?

a)

Bevy

b)

Raft

c)

Romp

d)

Colony

24.

Which sex of sea otters steals food from the other?

a)

Male

b)

Female

25.

How fast can a sea otter swim underwater?

a)

9 kph / 6 mph

b)

3 kph / 2 mph

c)

6 kph / 4 mph

d)

12 kph / 7.5 mph

26.

How does a sea otter swim?

a)

Vertical Undulation

b)

Horizontal Undulation

c)

Vertical Oscillation

d)

Horizontal Oscillation

27.

To how many offspring does a female sea otter typically give birth?

a)

1

b)

2

c)

3

d)

5

28.

When is the sea otter breeding season?

a)

Year-Round

b)

May-June

c)

January-March

d)

August-October

29.

Sea otter fur is the densest of all mammals.

a)

True

b)

False

30.

How many layers does sea otter fur have?

a)

1

b)

2

c)

3

d)

5

31.

Which sex of sea otter reaches sexual maturity first?

a)

Male

b)

Female

32.

How do sea otters defend their territories?

a)

Splashing

b)

Vocal Displays

c)

Raising Body Out of Water

d)

Kelp Perimeter

33.

What percentage of their body weight do sea otters consume daily?

a)

10-15%

b)

20-25%

c)

30-35%

d)

40-45%

34.

Sea otter individuals tend to have what type of diet?

a)

General

b)

Specialized

35.

Which is the smallest sea otter subspecies?

a)

Asian

b)

Northern

c)

Southern

d)

Western

36.

How does the Asian sea otter differ from other subspecies?

a)

Wider Skull

b)

Longer Nasal Bones

c)

Shorter

d)

Smaller Teeth

37.

What is the sea otter's diet?

a)

Carnivorous

b)

Herbivorous

c)

Omnivorous

d)

Unknown

38.

Sea otters are the only carnivores with how many lower incisors?

a)

2

b)

4

c)

6

d)

8

39.

What is a sea otter's den called?

a)

Holt

b)

Couch

c)

Bevy

d)

Lounge

40.

Sea otter home range size varies by sex.

a)

True, males' are larger.

b)

True, females' are larger.

c)

False

41.

Why was sea otter fur coveted?

a)

Density

b)

Insulating Quality

c)

Color

d)

Softness

42.

When was sea otter hunting banned?

a)

1911

b)

1972

c)

1925

d)

2011

43.

What is the sea otter's evaluation on the IUCN Red List of Threatened Species?

a)

Endangered

b)

Critically Endangered

c)

Extinct in the Wild

d)

Vulnerable

44.

What is the sea otter's greatest threat?

a)

Oil Spills

b)

Hunting

c)

Invasive Species

d)

Climate Change

45.

What is the sea otter's lifespan in the wild?

a)

23 Years

b)

13 Years

c)

33 Years

d)

43 Years

46.

Where do sea otters store their tools and food?

a)

Under Forearms

b)

Under Chin

c)

Between Hind Feet

d)

Entwined in Belly Fur

47.

What is the sea otter's parental care?

a)

Maternal

b)

Paternal

c)

Both, Maternal & Paternal

d)

None

48.

How long is a young sea otter dependent on its mother?

a)

6-8 Weeks

b)

6-8 Months

c)

1 Year

d)

6-8 Days

49.

What is the sea otter's circadian rhythm?

a)

Diurnal

b)

Crepuscular

c)

Cathemeral

d)

Nocturnal

50.

How long can a sea otter remain submerged?

a)

3 Minutes

b)

6 Minutes

c)

30 Minutes

d)

16 Minutes

51.

The feces of which animals are threatening sea otters?

a)

Domestic Cat

b)

Opossum

c)

Domestic Dog

d)

Rabbit

52.

What is the maximum fine for harming a sea otter?

a)

$2,500

b)

$25,000

c)

$250,000

d)

$250

53.

Sea otters have retractable claws.

a)

True

b)

False

54.

What purpose does the sea otter's whiskers serve?

a)

Find Food

b)

Detect Water Currents

c)

Assist Swimming

d)

Insulate Body Temperature

55.

Twins occur in how many sea otter births?

a)

2%

b)

12%

c)

22%

d)

42%

56.

How many offspring can a sea otter raise successfully each year?

a)

1

b)

2

c)

3

d)

5

57.

What advantage does delayed implantation offer the sea otter?

a)

Birth During Favorable Conditions

b)

Multiple Births per Year

c)

Caudal Fetus Orientation

d)

Larger Genetic Diversity

58.

What is the sea otter's population trend?

a)

Increasing

b)

Decreasing

c)

Stable

d)

Unknown

59.

What limits the sea otter's northern range?

a)

Sea Ice

b)

Killer Whales

c)

Giant Kelp

d)

Temperature

60.

What limits the sea otter's southern range?

a)

Giant Kelp

b)

Temperature

c)

Great White Sharks

d)

Sea Ice

61.

How many mammae does a female sea otter have?

a)

8

b)

2

c)

4

d)

6

62.

What marine habitats do sea otters inhabit?

a)

Neritic

b)

Oceanic

c)

Intertidal

d)

Coastal/Supratidal

63.

What preys on sea otters?

a)

Great White Sharks

b)

Coyotes

c)

Bald Eagles

d)

Killer Whales

64.

Which of these is a sea otter?

a)
b)
c)
d)
65.

Which of these are sea otter tracks?

a)
b)
c)
d)
66.

Which of these is a sea otter?

a)
b)
c)
d)
67.

What system does the sea otter inhabit?

a)

Terrestrial

b)

Aquatic

c)

Aerial/Arboreal

d)

Fossorial

68.

What is the sea otter's form of locomotion?

a)

Other

b)

Unguligrade

c)

Digitigrade

d)

Plantigrade

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