The Ultimate Octopus Quiz

By: HowStuffWorks.com Contributors

The Ultimate Octopus Quiz
Image: Alexander Rieber/EyeEm/Getty Images

About This Quiz

Octopuses are mysterious sea-creatures that always seem to intrigue young children. Octopuses are smarter and more talented than you may think. They even have a unique defense mechanism to protect them against predators. Take this quiz and learn about the mysteries of the octopus.
A male pillow octopus is ______ a female pillow octopus.
lighter than
A female pillow octopus is 40,000 times heavier than a male pillow octopus.
heavier than
the same weight as

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How do pillow octopuses mate?
The male octopus has sperm in his arm.
The male octopus has sperm in one of his arms, which he actually tears off and gives to a female octopus. Talk about a romantic gift!
They mate with typical sex organs.
The male octopus has sperm in his head.

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What does an octopus feel like?
a snake
the inside of your cheek
An octopus feels like the inside of your cheek. An octopus is actually not slimy.
sand paper

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Octopuses use their arms for:
moving around
tasting
both of the above
Octopuses arms are very versatile. They use their arms for moving around, feeling and tasting.

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Octopuses are related to:
clams
snails
both of the above
Octopuses belong to the phylum mollusca. Clams, snails and slugs are their closest relatives.

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Why are octopuses referred to as cephalopods?
because they have many long arms
because their arms protrude out of their head
Cephalopod means “head-footed”. Therefore, octopuses are given the name cephalopod because their arms protrude directly from their head.
both of the above

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Octopuses have:
only arms
Many people make the mistake by saying octopuses have tentacles. In reality, octopuses only have arms, which they use to do just about everything.
arms and tentacles
arms and antennas

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What is found inside an octopus's mantle?
hearts
digestive system
both of the above
The mantle is a muscle-like structure where all of the octopus's organs are found, including the heart, digestive system and reproductive glands.

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How do octopuses protect themselves from predators?
camouflage
Chameleons can learn a thing or two from octopuses. Octopuses have sophisticated camouflage abilities.
a hard protective shell
poisonous arms

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What color is octopus blood?
red
green
blue
Octopuses have blue blood, because a copper-containing protein binds to oxygen in their blood.

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How many hearts does an octopus have?
two
three
An octopus's blood does a bad job of circulating oxygen. Therefore, octopuses need three hearts to ensure good oxygen circulation.
four

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Chromatophores allow an octopus to:
reproduce
regenerate arms
change color
Chromatophores are pigmented cells that are found all over an octopus's body. These cells contain three colors and allow the octopus to blend in with its surroundings.

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How quickly can an octopus change color?
less than a second
The color-changing quality of an octopus is controlled by the nervous system. This means an octopus can change color in less than a second.
less than a minute
less than a hour

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What are iridophores?
reflective cells
The octopus also has numerous iridophores, which are reflective cells, all over its body. These reflective cells help accentuate the camouflage effect.
color cells
receptor cells

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An octopus's eyesight is:
non-existent
mediocre
very good
The anatomy of an octopus's eyes is similar to the human eye. Octopuses can easily see their prey and predators.

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An octopus's brain is:
very small
highly evolved
both of the above
An octopus may have a small brain, but it has a rather complex nervous system.

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An octopus's arms are mainly composed of:
muscle
Octopuses are very strong. Their arms are composed primarily of muscle, giving them the ability to tear through plexiglass.
fatty tissue
nerves

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Octopuses are:
nomadic
nocturnal
both of the above
Octopuses hunt for their food only at night and relocate their home every few weeks.

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What is the activity level of a typical octopus?
very lazy
Octopuses are known for being lazy, spending most of their time immobile in their den.
somewhat active
hyperactive

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A typical octopus lives for:
a few years
Octopuses generally have a very short lifespan, about three to five years.
many years
a few decades

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You Got:
/20
Alexander Rieber/EyeEm/Getty Images

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