The Port Phillip Common Dolphin Project aims to maintain a long-term understanding of Port Phillip’s community of common dolphins (Delphinus delphis) to inform wildlife and ecosystem reporting and management.
This community of dolphins is as remarkable as everywhere else in the world but Port Phillip; they live in the open ocean. They share the bay with approximately 120 bottlenose dolphins and five million people.
Our researchers first discovered a handful of common dolphins near Mornington in 2005.
The following figure provides a snapshot of the growth trend in the dolphin community. We use the measure of the number of individual dolphins identified each year and average this over five-year blocks to even out the variability from differences in methods and effort. The final figure of 58 is the average number of individuals for 2020, 2021 and 2022. This is likely to change as the data for 2023 and 2024 are added.