A Webquest
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Home
|Task
| Process
| Websites
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Assessment
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Blue-Ringed
Octopus
Your task is to research
and write a description of yourself.
Remember don't let on what you are!
A Webquest
|
Home
|Task
| Process
| Websites
|
Assessment
|
Blue-Ringed
Octopus
Your task is to research
and write a description of yourself.
Remember don't let on what you are!
Follow the steps below to help you complete your task.
1. Print the worksheet . You will use this to record your notes. Remember to keep a list of resources used.
2. Using the website links below and the books provided, read and take notes.
3. Use your notes to write sentences. Remember to use the sub-headings from the worksheet as a guide; include your name and resources.
4. Print your draft copy.
5. With a partner re-read your draft and edit your work.
6. Make the necessary changes to your draft on the computer.
7. Change the font and size to make your work look special. When you are happy with the final copy, print your work and show the teacher.
Click on the following links to find information
http://www.enchantedlearning.com/subjects/invertebrates/octopus/Blueringoctopus.shtml
| Introduction | Description | Diet | Habitat | Breeding | Resource |
Octopuses belong to a group of animals known as Cephalopoda. Cephalopods include octopus, cuttlefish, and squid, "Ceph" meaning head and "pod" meaning foot. This group of animals have their head attached to their feet!
The blue-ringed octopus is one of Australia's most venomous creatures.
Octopuses have eight arms, which are extended from the mantle (this is found at the bottom of the octopuses head). On each arm they have a double row of suckers.
The blue-ringed octopus has tentacles that can extend to about 20 centimetres in length and it weighs approximately 50 grams.
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They are yellow to reddish brown in colour with ringed markings. These markings change to a vivid iridescent blue when the animal becomes angry, excited or disturbed. It may also occur when feeding and as camouflage to conform to the surrounding environment. |
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The octopus moves by crawling or dragging itself along on one or two arms, trailing its body and other arms behind.
The octopus hunts mainly at night. Its diet mainly consists of crustaceans, particularly crabs and molluscs.
To kill its prey, the octopus can:
1. bite into its prey while holding the prey with its arms.
2. use its suction pads to prise open molluscs and oysters.
3. glide over the victim and squirt a defensive ink into the surrounding water, which causes the prey to become disorientated and die.
The blue-ringed
octopus is found in the Indo-Pacific waters. They are common
around Australia, and are also found in New Zealand, Papua
New Guinea, Indonesia, Fiji and Japan.
The blue-ringed octopus commonly lives in rock pools, sheltering in
rocky holes, old shells and discarded bottles. These shelters often
protect the octopus from large predators such as snapper, groper,
sharks and moray eels.
The males and females mate by embracing tightly. The male fertilises the female with a specialised tentacle. Their sole objective in life is to reproduce and the male dies after fertilisation.
The female carries her eggs with her, until she returns to her den, where she will then spawn. During this period, the females will eat very little, if at all, and after the eggs hatch, she will usually die, presumably from exhaustion.
http:// aqwa.com.au/octopus.html
