We are grateful to the personnel of the Coast Guard of Ponza, Fiumicino, and Gaeta (for Lazio Region) and the Coast Guard of Sorrento (for Campania Region) for sharing photos/videos of the whale and information about the first sightings. We also thank Michel Raynal (Paris), Sandro Mazzariol (CERT of Padua), Sabina Airoldi, and Maddalena Jahoda (Tethys Institute of Milan) for updates about Gray Whale travel, and Salvatore Viglietti (ARPA Campania) for making the map. Finally, we thank the reviewers for their suggestions, and we are grateful to the teacher, Maria Cristina Caracciolo, for the English language revision. This work is dedicated to the memory of Professor Gianni Pavan (University of Pavia, Italy).