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 26.5μgg−1drywt, 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. Levels of total arsenic were determined in muscle tissues of species of fish, crustaceans and molluscs from Cienfuegos Bay, Cuba. The arsenic content in the samples was determined using an energy dispersive X-ray fluorescence (EDXRF) method. The highest concentrations of total arsenic were found in crustaceans and average values for fish, molluscs and crustaceans were 10.2, 22 and 26.5μgg−1drywt, respectively.