Cake Sand Dollar (Arachnoides placenta)
Chek Jawa, 10th January 2016

Thick-edged Sand Dollar (Jacksonaster depressum)
Coney Island (Pulau Serangoon), 27th November 2015

Thick-edged Sand Dollar (Jacksonaster depressum)
Seringat-Kias, 28th June 2009

Keyhole Sand Dollar (Echinodiscus truncatus)
Tanah Merah, 8th February 2009

Oval Heart Urchin (Echinolampas ovata) (?)
Pulau Semakau, 22nd April 2008

Cake Sand Dollar (Arachnoides placenta)
Cyrene Reef, 23rd May 2008