Octopuses By Bharti
Transcript of Octopuses By Bharti
INVERTEBRATES
Types of invertebrates
Types of invertebrates
Molluscs
Arthropods
Worms
Porifera
Echinoderms
OCTOPUS
What kind of animal isthe octopus?
Characteristics.
Invertebrate
Acuatic mollusc
Cephalopod
It doesn’t have a
skeleton or spines
It’s oviparous
Cephalopod means «head foot»
The inside organs of the octopus are
protected by a mantle, which consists of
a thick covering of skin and muscle.
Octopuses use their mantle to swim. They
tighten all the mantle muscles at
once, throwing a blast of water from a
tube called the siphon, causing the
octopus to launch forward.
VIDEO: Parts of the octopus
Pay attention!
Parts of the octopus
How small do you
think an octopus
can be?
It can be smaller
than a tennis ball!
What do they eat?
Octopuses eat many different
kinds of sea creatures. They like
oysters and clams. They use
their suckers to pull the shells
apart and get the food inside.
They also like lobsters and
crabs. Octopuses have a sharp
beak. They use it to break an
animal's shell. Then it kills the
animal with poison that the octopus makes in its mouth.
Octopuses have a
BEAK:
Oysters Clams
Crabs Lobsters
Where do octopuses live? They live in the
ocean, especially in coral reefs. Octopuses are characterized by their eight arms, usually with sucker cups on them. They are highly intelligent, but have a very short life.
A very famous octopus died a few months
ago. Who knows what his name was?
OCTOPUS PAUL
VIDEO: The
Mimic Octopus
VIDEO: The Mimic Octopus
The mimic octopus can transform into 15
different species. We can see three in
the video, can you remember which?
Reproduction
The octopus mother lays thousands of eggs. She
guards them for weeks. When the baby
octopuses are born, the eggs burst open and
the tiny octopuses swim out. The mother
octopus will die soon after her eggs hatch. She
will never see her babies again. Many babies
will be eaten by fish, birds or other creatures.
The male's penis is in the third tentacle. They lose
the tentacle after mating. But after some time it
will grow a new arm.
How many times does a female octopus reproduce?
Why does she keep
carressing them?
VIDEO: Mother
Octopus
Defending themselves
Octopuses face many dangers in the sea, but they have ways of protecting themselves:
Camouflage - They have special coloring to help them camouflage in their surroundings.
Hiding - The octopus can change colors which can confuse their enemies. They can also hide in holes in the rocks.
Ink cloud - The octopus squirts a dark, inky liquid into the water and then swims away to safety.
Did you
know...?
An octopus can
survive long periods
of time eating it’s
own tentacles. If the
animal finds
food, can
regenerate again.
Did you know…?
The pupils of an
octopus are
quadrangular.
VIDEO: Octopus vs Shark
Who will win?
The End