The great red crab migration

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Across
  1. 4. going to one place to another
  2. 6. large water
  3. 7. a large number
Down
  1. 1. something that keeps going
  2. 2. movement to one region to another
  3. 3. A place with sand and water
  4. 4. a red shell creature
  5. 5. something that is now living