Coral predators are a natural part of a healthy marine ecosystem. However, excessive densities of some corallivores, such as coral-eating snails or parrotfish can result in dramatic and widespread declines in coral cover. Coral predators have different feeding strategies for coral polyps. The field work of the research was performed at a total of 12 locations (6 in protected areas (PP Telašćica, NP Kornati and NP Mljet) and 6 in an area within the Natura 2000). The effect of sea snails Coralliophila meyendorffi, Babelomurex cariniferus, Simnia spelta, Pseudosimnia carnea, and parrotfish Sparisoma cretense on stone corals and gorgonias, as well as their distribution and abundance, was investigated. Ecological factors (primarily sea temperature and depth) were compared with the number of predatory species and the appearance of corals (degree of damage of individuals and colonies) at the studied stations. The results revealed the negative effects of predatory snails and parrotfish on coral fauna at the studied stations.There is no direct correlation between sea temperature and the number of coral predator species. The correlation between sea temperature and the distribution of the studied species S. cretense was determined. Sea snails depend on sea temperature only through the range of the species they feed on.