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Phylum Arthropoda-Class Crustacea

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

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Phylum Arthropoda-Class Crustacea

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  1. Phylum Arthropoda-Class Crustacea Shrimp Hermit Crab Daphnia Spiny Crab

  2. 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

  3. 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

  4. 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

  5. Barnacle Larvae New species of “Blonde Lobster” Barnacles Mantis Shrimp Barnacle feeding under water

  6. 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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