The most dominant decapod crustacean was porcellanid.
Invertebrates associated with corals can be obligate and facultative associations. Decapod crustaceans are an abundant group of coral associated invertebrates. Most colonies of Pocillopora damicornis died after the coral bleaching events in the Gulf of Thailand in 2010. The aim of this study was to quantify the species composition of decapod crustaceans associated with dead colonies of the coral P. damicornis from Mu Ko Angthong, Surat Thani Province in the Western Gulf of Thailand. Dead coral colonies of P. damiscornis were collected from the study sites in Mu Ko Angthong. The decapod crustaceans were removed from the dead coral colonies and were identified under a dissecting microscope. Decapod crustaceans from 7 families and 10 genera were recorded from the dead coral colonies. The most dominant decapod crustacean was porcellanid. The density of associated decapod crustaceans in P. damicornis colonies was significantly negative related with the volume of space in coral heads. The shrimps in family Hippolytidae were also abundant in the dead coral colonies. This study shows