The Tracce nel Blu expedition ended on 9 October after setting out on 3 October along Sardinia’s coast. In its report published on 13 October, Italy’s National Research Council records 497 miles sailed, 23 hours of hydrophone listening and 30 hours of visual cetacean monitoring, with sightings of striped and bottlenose dolphins. [1]

At nine sampling stations, the CNR-Irbim team collected 108 filters for microplastic analysis. The University of Milano-Bicocca took 14 environmental DNA samples to look for traces of the monk seal. These are samples to be studied, not confirmation that the seal was present: results will feed into three reports on cetaceans, environmental DNA and microplastics. [1]