Phylum Arthropoda-Class Crustacea

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Phylum Arthropoda-Class Crustacea
Shrimp
Hermit Crab
Daphnia
Spiny Crab
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Characteristics

• Have 3 body sections-head, thorax, abdomen
• Sometimes the head and thorax are joined
  together, this is called the cephalothorax
• 3 mouth parts
• 5 or more pairs of legs
• 2 pairs of antennae
• Sometimes have a chiliped-a claw used for eating
  and for defense
• Some crustaceans can regenerate lost limbs

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Facts

• More than 50,000 species
• Lobsters, crabs, krill, shrimp, barnacles, and
  crayfish are examples
• 10,000,000 tons of crustaceans were produced in
  2005 for human consumption
• Exoskeleton made of the protein chitin (a hard
  substance) and calcium

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Krill

• Staple in many large marine animals diet such as
  baleen whales, mantas, whale sharks, crabeater
  seals and other seals, and a few seabird species
• Occur in all oceans of the world.

Thousands of Krill
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Barnacle Larvae
New species of Blonde Lobster
Barnacles
Mantis Shrimp
Barnacle feeding under water
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Importance of Crustaceans

• The larger crustaceans (shrimps, lobsters, and
  crabs) are used as food throughout the world
• Small crustaceans, such as water fleas, and
  krill, eat photosynthetic plankton and larger
  carnivores such as fish and whales eat them.
• Still others are crucial in recycling nutrients
  trapped in the bodies of dead organisms.

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