Arctic animals

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Across
  1. 2. Cold water fish with fins and grills
  2. 4. Black and white bird that waddles
  3. 5. Huge animal with a horn like a unicorn
  4. 7. Small, fluffy fox with a winter coat
Down
  1. 1. Arctic animal that turns white in winter
  2. 3. Arctic bird that can dive and fly
  3. 4. Big white bear that swims in icy water
  4. 6. Wild dog that howls in the snow