How can people using the river for recreation recognise Caulerpa taxifolia?
You can check this website and a pamphlet Identifying Caulerpas in South Australian waters is available from PIRSA that gives colour photographs of Caulerpa taxifolia and its harmless relatives. If you do not have a copy and cannot be sure, it’s best to be safe rather than sorry and dispose of what you find in a sealed, biodegradable bag.