Mon Prof Augmenté
Lagoon Oysters and Tide-Flat Oysters
Age 9 · Biology
In a lagoon, oysters stay underwater all the time. On a coast, the tide pulls the water away and the oysters close their shells.
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Age 9: open this week
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In the picture
- Open oyster shell under water, with ropes and a wooden frame above.
- Pale food particles drifting past the open shell.
- Closed oyster shell in a mesh bag on wet mud.
Examples
- A garden sprinkler left on all day keeps giving water; one on a timer stops between cycles.
- A fish in a full tank can swim and feed; a fish in a drained pond waits for water to return.
Key takeaways
- Oysters feed by filtering tiny food from the water.
- When the water is gone, they shut their shells and stop feeding.
Quiz: Lagoon Oysters and Tide-Flat Oysters (Age 9)
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Why do oysters in a lagoon grow faster than oysters on an ocean coast?
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What happens to oysters on an ocean coast when the tide goes out?
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What does staying underwater all the time let a lagoon oyster do?
The answers, each with its explanation, are in the app. This lesson has left the free week, so its quiz is part of the subscription.
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