Polychaete fauna were sampled from bottom sediment during three seasons between autumn 2006 and spring 2007. Samples were taken during low tide from 7 stations at the eastern harbour of Alexandria (Egypt) at depths between 3 and 11 meters. 12 Polychaete species were encountered of which 3 are considered new in the Egyptian Mediterranean waters. The collected specimens were preserved at Marine Reference Collection Center of National Institute of Oceanography and Fisheries, Alexandria, Egypt.

This dataset contains data on syllidae which were sampled at 2 station on the North Mediterranean coast of Egyptian coastline iduring the spring of 2010. The sediment samples were collected using a Van Veen grab and washed and sieved through a 0.3 um sieve.

Within the frame work, organized by the National Institute of Oceanography and Fisheries, Alexandria, Egypt, 15 quantitative samples were collected and analysed for Polychaetes using a Van Veen grab on the soft bottom, at depths ranging from 12m to 106 m. Samples were taken over two seasons (spring and summer, 2008) during two trips to the Northeastern coast of the Egyptian Mediterranean waters at El Tina Bay, Balteem, Abokhashaba and Gamasa.

The data in this dataset results from different sampling campaigns along the Mediterranean coast of Egypt and the Suez Channel. Most samples of Polychaetes were taken using a Van Veen grab, while samples from Port Said Harbour were collected by knife and net used for collecting fauna. Specimens including those of newly described species were deposited at the Marine Reference Collection Center of National Institute of Oceanography and Fisheries, Alexandria under Code Numbers.