On Tuesday 5th September 2017 at 12.47 Wolf-Dieter Stucken, a Swiss yachtsman, while sailing at a distance of 10 miles from Rosignano Marittimo (Province of Livorno) in a NE direction, coming from Capraia, saw and photographed a large specimen of a delphinid, with a pattern of white patches on a shiny black skin, which would suggest that it could be a specimen of Orcinus orca.

Regrettably, the photo was taken from a distance and at an unfavourable angle to allow sure identification. However, although it was the first time that the presence of this species of cetacean had been documented in the waters of the Tuscan Archipelago, already on other occasions (2016 and 2017) it appears to have been observed. In our waters, the presence of the Orca is classified as occasional.

Wolf-Dieter Stucken was contacted by email: unfortunately his testimonial does not appear to add any further useful information for a correct and certain identification of the specimen in question.

The photograph was circulated among numerous Italian cetologists : although they all agreed that, as far as is visible from the photo, on the possible attribution of the dorsal fin to the species Orcinus orca, they unanimously declared that from what is visible of the pattern on the specimen, its correspondence to the specific pattern of this species is unclear, remaining in unanimous agreement that it was impossible to determine the species for certain  on the basis of that single frame.

Even if the information available does not appear sufficient to identify to which species the specimen belongs with scientific certainty, in probabilistic terms  it could have been the same Orca of which a sighting had already been declared on other occasions in the waters of the Tuscan Archipelago.