It flows southeast past the village of Linguizzetta, passes under the T10 coastal highway, then turns north and flows through wet meadows (Marais de Chiosura) behind the beach before cutting across the beach to the sea.

[2] The land around the lower part of the Chiosura, known as the Marais de Giustignana, has been classified as a Zone naturelle d'intérêt écologique, faunistique et floristique (ZNIEFF).

It extends along the river on both sides of the T10 coastal highway, and along its Campo Vecchio and Bottari tributaries.

It is mostly wooded with black alders 15 to 20 metres (49 to 66 ft) high rising among marsh irises, loosestrife, hops, willowherb and sedges.

The Chiosura drains the marsh, then runs for about 500 metres (1,600 ft) through a reed bed along a degraded sandy lido (coastal dunes) before entering the sea.