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Barnacles

Barnacles. Live in intertidal to shallow subtidal zone Sessile (non-mobile) Filter feeders Attach permanently to a hard substrate and encrust it. Eat mostly plankton. Crabs. Decopods (10 feet) Typically walk sideways Benthic: intertidal to subtidal

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Barnacles

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  1. Barnacles • Live in intertidal to shallow subtidal zone • Sessile (non-mobile) • Filter feeders • Attach permanently to a hard substrate and encrust it. • Eat mostly plankton

  2. Crabs • Decopods (10 feet) • Typically walk sideways • Benthic: intertidal to subtidal • Mostly scavengers and are omnivores. • Claws are used for clasping food and attracting mates.

  3. Lobsters • Decopods • Benthic: Subtidal rocky or muddy bottoms • Tropical to mid-latitude waters. • Use Antennae as sensors • Have blue blood due to copper in their blood. • The green in lobster is due to a special pancreas. • Eat live prey such as small fish and molluscs. • Sometimes eat other lobsters

  4. Shrimp • Decopod • Includes plankton such as copepods and krill • Live on muddy and rocky bottoms: Subtidal • Swim better than they walk • Important food source for fish and whales • Feed on other plankton and algae

  5. Commercial Uses Primarily food Shrimp are a 50 billion dollar/year industry Lobstering and Crabbing are also billion dollar industries. Market price for a whole Maine lobster can range anywhere from 8-80 dollars depending on where you buy it. Dungeness Crab, King Crab, Snow Crab, and Blue Crab are the most popular to find in restaurants and grocery stores.

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