Pacifiers, plastic bags, dinosaurs, necklaces, pencils, maps and footballs are just a few of the items that have dropped into the Australian Sea Lion exhibit at Adelaide Zoo but none of these have proved as bad for our sea lions health as much as the simple coin. A coin is such an unassuming item but sitting at the bottom of a pool can look like a shiny little fish to an inquisitive sea lion and this is exactly what our male Australian Sea Lion "Tasko" thought.