“…Unlike siliceous sands formed by physical or chemical origin, coral sands are mostly calcareous sands formed by various marine organisms such as corals and shells through long-term geological effects (Wu et al, 2022) (Figure 1). Coral sand is a special geotechnical material that is widely distributed in tropical oceans between N30 °and S30 °, and it has been found in the Caribbean Sea, Hawaii, Polynesia, Indonesia, the north coast of Australia, the Indian Ocean, the Persian Gulf, the Red Sea, the South China Sea (Lv et al, 2019;Yang et al, 2022).…”