In the last winter, a total of wild marine fish species were collected from two different marine water sources. Samples were clustered into 70 bysuria (Engraulis encrasicolus) fish that were collected from Mediterranean coasts of Damietta and 50 grouper (Epinephelus gigas) from Hurghada Red Sea coast. Bysuria fish were examined for the presence of abdominal and intestinal cestodes larvae. In grouper, larvae were detected in intestine, abdominal cavities, liver, spleen and gonads in grouper fish that can be seen by naked eyes. The total infestation rate of larval cestodes in examined fish was 50%. As 54% of the detected larvae in Bysuria fish were belonging to diphyllobothrid plerocercoid larvae, while 44 % of detected larvae in grouper were belonging to Trypanorhyncha Plerocrcoid larvae. The morphological characters of the detected larvae were discussed. Molecular analysis was performed to confirm the final ID of the detected diphillobothrid larvae.