Benthos and benthic communities

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Across
  1. 3. Example of Echinoderm that live on the sandy beach environment.
  2. 8. Can be found in the tropic waters.
  3. 9. The deepest part of the seafloor,including trench walls and bottom of trenches.
  4. 10. Derive part of nutrition from algae.
  5. 12. Live on or are associated with benthic surface.
  6. 13. First discovered in 1977.
  7. 16. Coral reef can protect ___________.
  8. 17. Active coral reef builds up over time as ________ slowly sinks.
  9. 18. Metal which is rich in the hydrothermal vent.
Down
  1. 1. Threat for declining coral reef.
  2. 2. Have anaerobic (Oxygen-free) conditions.
  3. 4. To provide more stable environment for the sandy beach communities.
  4. 5. Part of coral reefs.
  5. 6. Conditions for coral reef development.
  6. 7. Food chain around the hydrothermal vent is supported by the __________ process.
  7. 11. To avoid from drying out, organisms in the supratidal zone mostly have _______.
  8. 14. Spray Zone and Intertidal Zone
  9. 15. Hydrothermal vent species.