Underwater Astonishments

12345678910111213
Across
  1. 2. the quality of being dense; a large quantity
  2. 8. a range of many things that are very different from each other; an abundance of the kind
  3. 10. not deep; ⇔ deep
  4. 11. to travel around an area to learn about there
  5. 12. a living thing; an animal; a person
  6. 13. a head-foot such as a squid, cuttlefish, octopus
Down
  1. 1. not familiar; not identified
  2. 3. unbelievable; extremely good
  3. 4. antonym for foreground; ⇔ foreground
  4. 5. beneath the surface of the water; under the sea
  5. 6. a regular arrangement of lines, shapes colors, etc.
  6. 7. the earth; the world, especially when talking about the environment
  7. 9. astonishment; wonder; amazement