Abstract
Marine fungi can be found in every marine habitat and are important organisms from ecological and biotechnological perspective. However there is little information on marine fungi in Libya. This study is to reports on fungi species associated to the seagrass Posidonia oceanica(L.) Delil. An endemic seagrass of Mediterranean Sea. Method used is that, the Organisms were isolated from landed plant of the seagrass Posidonia oceanica from different locations along the East costal of Libya. The collected specimens were examined within one week microscopically. Examined samples were then incubated for further 3-4 weeks in sterile glass chambers at room temperature and reexamined. Fungi were identified from fruiting bodies (Ascocarps or Pycnidia) or from superficial conidia in the case of Hyphomycetes. Standard identification keys were used. (12) Fungal taxa have been identified .The identified organisms belong to the classes, Ascomycetes (6) taxa, Hyphomycetes (5) taxa and Coelomycetes (1) taxa. Pleospora pelagicum (Ascomycetes) and Camarosporium roummegueri (Coelomycetes) were not reported, previously from Libya.