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Oysters

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Interesting Facts Some types of oysters can produce pearls inside their shells. They can grow to be about a foot long. ... Pictures Find the oyster in the pictures! – PowerPoint PPT presentation

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Title: Oysters


1
Oysters
  • Emilie Blotiau

2
Scientific Name
  • Oysters scientific name is Crassostrea madrasensis

3
Physical Characteristics
  • Have a rough outer shell.
  • Inner shell is smooth from the erosion of sand.

4
Anatomy
  • Oysters have gills like fish that filter the
    oxygen out of the water.
  • They are filter feeders, and use beating cilia to
    catch food.
  • They have a small three chambered heart that lies
    under the adductor muscle.
  • The mantle contains many small blood vessels
    which filter for oxygen in the water.

5
Habitat
  • Live mostly in the intertidal zone.
  • Live between rocks and attached to hard
    substrates.
  • No preference to ocean temperature however they
    feed best at 50 degrees.
  • Reside mostly in brackish water.

6
Oysters Diet
  • Oysters are filter feeders.
  • Plankton and other particles are caught by the
    beating cilia, and get stuck in the mucus
    membrane of the gills.
  • The gills transport the food to the stomach.

7
Reproduction
  • One cannot determine if an oyster is male or
    female by their shells.
  • they are one sex or the other (not
    hermaphroditic).
  • Can change sex once or more during their
    lifetime.
  • It is almost impossible to tell the age of an
    oyster.

8
Interesting Facts
  • Some types of oysters can produce pearls inside
    their shells.
  • They can grow to be about a foot long.
  • Oysters have blood and veins, their blood is
    colorless.
  • It is extremely hard to open a live oyster shell.
    You must use a knife.

9
Pictures
10
Find the oyster in the pictures!
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