**Acknowledgements**

The authors would like to acknowledge the Director of Institute of Tropical Biodiversity and Sustainable Development (Bio-D Tropika) of Universiti Malaysia Terengganu, Dato' Prof. Dr. Mohd Tajuddin Abdullah, for his support and encouragement in organizing the 20th Colloquium of Malaysia and Singapore Society of Australia (MASSA2018), February 8–9, 2018, where parts of this write up are presented. We would like to thank Media Kreatif UMT for the image of erosion along Terengganu coastline and Mr. Mokhtar Ishak for the drone images of breakwater along UMT beaches.
