“…Andrews (1940) and Hendy et al (2015) point out that the dated benthic organisms are characteristic of shallow estuarine environments. However, the occurrence of these species, observed in the present study, was also observed in the tidal region of Paranaguá Bay, located in southern Brazil (Boehs et al 2004), suggesting that these organisms can occur in coastal areas and at shallow to medium depths (Ekdale 1974;Gandara-Martins and Almeida 2013). Similarly, the δ 15 N values could indicate the presence of mixed continental and oceanic waters, characteristic of estuarine environments (França et al 2015).…”