The aim of this study is to understand the population structure of the coralligenous species by studying the intraspecific diversity of the populations and their connectivity.

The principle of the study of their connectivity within the Mediterranean Sea is based on the analysis of the dissimilarity of genetic markers. At least thirty specimens of Myriapora truncata, Lithophyllum stictaeforme/cabiochiae and Caryophyllia inornata are collected from different sites. They are compared with each other to reveal the population structure at each site^?, and also to unveil if a contextualization factor would permit a partial explanation of this structure. The sampling is also performed on different ecological profiles at each site in order to know the structure of the population according to the profile^? and thus the species ecology . The studied species are found throughout the Mediterranean Sea, which implies the possibility to discover cryptic species^?.
These factors will influence recommendations to managers for the protection of these habitats and associated resources.