Animal

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Across
  1. 3. They have been referred to as "primitive fish"
  2. 5. a spiny mammal
  3. 6. these creatures don't have a brain
Down
  1. 1. their height is 1.4m to 2.1m
  2. 2. Look Like Dogs but Are Not Related
  3. 3. expand themselves when in danger
  4. 4. lion of the ocean
  5. 6. related to dogs, coyotes, foxes, and wolves.