Only 18 refugees and migrants have entered Greece by sea over the past 24 hours, a week after a European Union deal to deport new arrivals back to Turkey came into effect.
However, more than 53,000 remained stranded in Greece, through which more than a million people from the Middle East and Africa have passed since the beginning of 2015 - heading to more prosperous European countries.
Arrivals, mostly in frail smugglers' boats from Turkey, peaked above 200,000 in October.
Following last month's EU-Turkey deal the numbers have dropped, with just 1,704 arrivals so far this month - about 189 daily.
About 11,000 migrants live in a tent city on the closed Macedonian border, hoping to continue north, despite repeated appeals from Greek authorities to relocate to organised shelters.