“…One of the most important details of this finding is the fact the animal was found in a river, 16 km upstream from the river mouth. Almost all records of SESs are from coastal locations (e.g., Oosthuizen et al 1988, Setsaas et al 2008, Shaughnessy et al 2012, Acevedo et al 2016, and to our knowledge there are only a few reports of individuals seen in rivers, and very few in Chilean waters (Sielfeld 1978(Sielfeld , 1983Torres 1981, Aguayo et al 2006. A report from other country described a male seen almost 4 km upstream of the Breed River off the Southern African coast in 1959 (Oosthuizen et al 1988).…”