Across
- 5. - A mammal known for its intelligence and playful behavior (7 letters)
- 8. - Someone who advocates or works for the protection and preservation of the environment (14 letters)
- 9. - A reptile with a bony or cartilaginous shell (6 letters)
Down
- 1. - Efforts to protect and preserve natural resources (12 letters)
- 2. - A hard substance secreted by certain marine polyps for the formation of reefs (5 letters)
- 3. - A community of living organisms in conjunction with the nonliving components of their environment (9 letters)
- 4. - A place where fish are bred or caught (7 letters)
- 6. - Relating to the sea or ocean (6 letters)
- 7. - The natural environment where an organism lives (7 letters)
- 10. - A ridge of rock or sand at or near the surface of the water (4 letters)