Report any suspicious alga sighting that might be didymo including location, time and a description of the algae material to the Service by phoning 1300 INFISH.
Remember that didymo may be confused with Tasmanian native species of algae but can be distinguished by the following characteristics.
- Touch – although it appears slimy, didymo doesn’t feel slimy but rather spongy and scratchy like wet cotton wool
- Strength – didymo attaches very securely to river stones and doesn’t fall apart or disintegrate when you rub it between your fingers or roll it in the palm of your hand
- Colour – didymo is beige, brown or white but not green
- Odour – live didymo has no distinctive odour
- Microscope – definitive identification requires microscopic analysis.
Collect a Sample
Collect a sample of the algae material in a jar or bottle containing water, note the exact location and contact the authorities as soon as possible. The sample will be tested at an accredited laboratory for the presence of didymo.
A number of authorities share the responsibility for investigating potential didymo sightings. These include the Inland Fisheries Service, Hydro Tasmania and the Department of Primary Industries, Parks, Water and Environment, which includes Biosecurity Branch, Quarantine Tasmania and the Parks and Wildlife Service.