A small school of dolphins frolicked in Thessaloniki’s port yesterday morning, to the delight of the northern city’s residents. With the opening of the annual International Trade Fair over the weekend, the city is used to heavy traffic and many visitors at this time of year. But the visit by the dolphins to the gritty harbor area is both rare and enchanting. The sentences are the heaviest handed down so far in a case of migrant trafficking. Authorities to date have found 275 of an estimated 350 migrants, including 14 women and 13 children. Most of them are believed to be Iraqi Kurds and Afghans. Fears remain that some may have drowned.