Marine mammals have been used globally as sentinels for ecosystem health and function as they are top order predators, with long life spans. In Cetaceans trace elements have been linked to neurological disorders, reproductive disorders, and immunosuppression contributing to death. Trace element toxicology analysis conducted within Victorian waters has historically focused on sediments and water of Port Phillip Bay and Western Port Bay, with biological studies focusing on fish, molluscs, and recently penguins. To date there has been limited contaminant burden studies on marine mammals within the region. Previously determined mercury concentrations in a handful of stranded Burrunan dolphins (Tursiops australis) from the state (sampled between 2004-2008) were found to be amongst the highest in the world, exceeding those of known polluted waterways such as the Mediterranean. This raises the question as to whether other dolphins (delphinids) within the region have similar trace element body burdens, or if this is species specific. Here we present the hepatic trace element concentrations in three delphinid species; Burrunan dolphin, short-beaked common dolphin (Delphinus delphis), and the common bottlenose dolphin (Tursiops truncatus). Assessing the hepatic concentrations across three species with their habitat overlap within Victorian waters, helps us to understand if the high mercury concentrations previously determined, are species or location specific. Further, this places Victorian waters in a global context for trace element bioavailability with comparisons made to trace element body burdens in the same species from other regions.