Most of the migrants are from Bangladesh, and others come from Sudan and Libya, among other countries.
A vessel carrying 75 migrants has been allowed to dock in Tunisia after being stranded off the coast for nearly three weeks.
The country has seen a rise in people seeking sanctuary after fleeing from Libya.
And most of them arrive after trying to make the crossing to Europe.
Al Jazeera’s Sonia Gallego reports from Zarzis.