If Squido eats 200 oysters, when Crabby eats twice as many oysters as Squido does, he eats 2*200 = 400 oysters.

Together, they eat 400+200 = <<400+200=600>>600 oysters.

# Answer

600
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To get his fill of oysters, Crabby has to eat at least twice as many oysters as Squido does. If Squido eats 200 oysters, how many oysters do they eat altogether?
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600
To get his fill of oysters, Crabby has to eat at least twice as many oysters as Squido does. If Squido eats 200 oysters, how many oysters do they eat altogether?
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