Crustaceans
(Lobsters,Crabs, and Shrimp)
Just the Facts….
• Crustaceans belong
to the Phylum
Arthropoda (jointed
feet).
• All Arthropods have
jointed appendages.
• All Arthropods have
an exoskeleton.
The Exoskeleton
• Is made of a tough
fibrous material called
chitin.
• This gives the skeleton
strength and flexibility.
• There are several pairs (5
or more) of jointed
appendages (movable
arms and legs).
Molting
• Molting is when the exoskeleton is shed
as the organism outgrows it.
Other Characteristics
• Bilateral symmetry
• Two main body segments Cephalothorax
 Abdomen
• They filter feed, scavenge, or are predatory
• Use appendages for food getting and
movement
• Found throughout the oceans of the world
• Are an important food source for other marine
organisms
• They reproduce sexually, fertilize externally
• Have gills to breathe
The Mantis Shrimp
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Tough Guy!
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The Mantis Shrimp vs. The
Blue Ringed Octopus
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Crustacean Wars
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