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The Squid
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Table of Contents
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Cover Page
Classification
Habitat
Predators and Prey
Anatomy and Physiology
Threats to the Squid
Works Cited
Classification
Kingdom:
Animalia
Phylum:
Mollusca
Class:
Cephalopoda
Order:
Teuthida
Family, Genus, There are over 300
& Species:
known species of
squid, coming in
all shapes and
sizes.
Bathyteuthis abyssicola
Onychoteuthis banksii
Pterygioteuthis giardi
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
• 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
• Squid dine mostly on fish,
crustaceans such as shrimp,
and other squid
• See a squid in action by
clicking on the image below:
Anatomy & Physiology
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
• 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
• 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
• 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/giantsquid-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.squidworld.com/squid-predators.html