Total arsenic in marine organisms from Cienfuegos bay (Cuba)

► Levels of As are reported in marine food from Cienfuegos Bay, Cuba. ► The highest concentrations of total Arsenic were found in crustaceans. ► Average values for fish, molluscs and crustaceans were 10.2, 22 and 26.5 μg g−1 dry wt, respectively. ► As concentrations in fish have increased 12 times in the last 30 years. ► Impact of arsenic waste from the fertiliser industry located in Cienfuegos bay.