This beach has been named after the little island found there which looks like a dome (troullos).
It is situated on the way to Koukounaries right after the crossing which leads to the monastery of Panagia Eikonistria.
You can reach Troullos by road and enjoy a swim in the bluish - green transparent waters under the shade of the pine trees which reach almost the sea water.
There are numerous hotels, hostels and tavernas in Troullos.
Source: www.skiathos.gr