barnacles
DESCRIPTION
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 - PowerPoint PPT PresentationTRANSCRIPT
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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
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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.
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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
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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
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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.