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The Squid. Click Here to Begin. Table of Contents. Cover Page Classification Habitat Predators and Prey Anatomy and Physiology Threats to the Squid Works Cited. Classification. Bathyteuthis abyssicola. Onychoteuthis banksii. Pterygioteuthis giardi. Habitat.

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The squid

The Squid

Click Here to Begin


Table of contents
Table of Contents

  • Cover Page

  • Classification

  • Habitat

  • Predators and Prey

  • Anatomy and Physiology

  • Threats to the Squid

  • Works Cited


Classification
Classification

Bathyteuthis abyssicola

Onychoteuthis banksii

Pterygioteuthis giardi


Habitat
Habitat

The habitat of the squid depends on the species, size, and stage of development the squid is in.

Squid can be found in almost any salt water region of the world in both the shallows and in depths up to 9,000m. However, some species have been known to move into fresh water in search of food.

Learn more about the Giant Squid and why it has been so illusive to scientists. CLICK THE IMAGE ABOVE.


Predators prey
Predators & Prey

Predators

Prey

Squid dine mostly on fish, crustaceans such as shrimp, and other squid

See a squid in action by clicking on the image below:

  • Squid are precious food sources for large fish, sea birds, sharks, and even sperm whales

  • Squid is served as a delicacy in many parts of the world, where it is referred to as Calamari



Feeding and digestion
Feeding and Digestion

  • Squid have 8 legs

  • Squid grab prey with suction clubs on the end of the tentacles and pulling them into their legs.

  • Stab prey with sharp beaks

  • Prey is further broken down by the radula

  • Once the food is shredded, their muscular tongue helps direct it down the digestive tract.


Other important structures
Other Important Structures

  • Mantle covers the body

    • Gill like slits for respiration

    • Contains a siphon for jet propulsion

  • Skin covered in chromatophores

    • Change color to match surrounding

  • Ink sac provides further protection

See the amazing camouflaging abilities and use of ink glands in cephalopods by click on the picture above.


Ecological threats to squid
Ecological Threats to Squid

  • The main threat to squid is commercial fishing

    • Overharvesting mature squid populations

    • Fishing boats can destroy squid egg deposits

Squid Harvest on US West Coast


Works cited
Works Cited

  • Fish Watch: Market Squid. 2011. National Oceanic and Atmospheric Administration. http://www.nmfs.noaa.gov/fishwatch/species/market_squid.htm

  • Octopus and Squid. 2011. World Wildlife Federation. 17 Feb. 2012. http://www.treasuresofthesea.org.nz/octopus-and-squid#5

  • Rare Photos: Giant Squid Eaten by Sperm Whale. 2012. National Geographic. http://news.nationalgeographic.com/news/2009/10/photogalleries/giant-squid-sperm-whale-pictures/

  • Squid. 2012. Exploring Nature Educational Resource. 17 Feb. 2012. http://www.exploringnature.org/db/detail.php?dbID=43&detID=2796

  • Squid Fact and Information. 2009. Squid World. http://www.squid-world.com/squid-predators.html