THE OCEAN

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Across
  1. 3. You can build one
  2. 5. Protection from the sun
  3. 7. Breaking on the beach
Down
  1. 1. Sit under it
  2. 2. 8 legs
  3. 3. It's all over the beach
  4. 4. It's jiggly
  5. 6. Fin & teeth