Coral physiological data of Platygyra carnosa were collected from three in-situ locations and laboratory experiments in controlled-conditions in Hong Kong waters. An underwater respirometer was used to measured changes in dissolved oxygen, pH and temperature in dark and light conditions at coral surface level, and water sample loop collected for measurement of calcification rates through alkalinity anomaly method. The in-situ and laboratory coral physiology data were compared to show the replicability and accuracy of the instrument. Moreover, diel cycle of respiration, photosynthesis and calcification, P vs I curve and responses of P. carnosa to different locations were measured.

Locations of sampling:Laboratory experimentsDate / time: November 2017 – July 2018Lat / Long: 22.422° N – 114.214° EIn-situ (Chek Chau, Port Island)Date / time: April 2018Lat / Long: Hong Kong, 22.502° N –114.356° EIn-situ (East Dam, Sai Kung)Date / time: April 2018Lat / Long: Hong Kong 22.360° N – 114.376° EIn-situ (A Ye Wan vs Gruff Head)Date / time: Summer 2019Lat / Long: Tung Ping Chau Marine Park (22.546° N – 114.431° E); Hoi Ha Wan Marine Park (22.475° N – 114.324° E)