Have you seen any upside-down jellyfish around Lake Macquarie? Upside-down jellyfish are considered a globally invasive jellyfish that were first reported in Lake Macquarie in 2017 with fluctuating numbers between seasons. As part of a PhD project, I am aiming to figure out the extent of their distribution around Lake Macquarie and what time of year they occur. This is important as they are occurring in large numbers, which has the potential to impact residents, fisheries, tourism, and the surrounding ecology.