Aquatic Biosecurity Threats

There are many pests and diseases that could cause serious impacts if introduced to Tasmanian waters. Some examples of aquatic pests and diseases that pose a threat to Tasmania include:
  • Soft-shell clams (Mya japonica)‚Äč is a large bivalve marine mollusc and are native to the Northern Hemisphere. Soft-shell clams can grow up to 150 mm and is most commonly found in shallow sub-tidal and intertidal zones. The clam lives beneath the soil surface and buries itself up to 50 cm deep. It uses long siphons, which pump water for respiration, feeding and spawning.
  • Didymo is a freshwater alga not yet present in Australia. It takes just one cell in a single drop of water to be spread between waterways. The cells multiply quickly to form massive blooms that completely smother the stream or lake bed. These algal clumps adversely affect water quality, aquatic invertebrates and fish stocks, and are a hazard for hydro generation, irrigation and recreation.


See also:

There are a number of other potential marine pests and freshwater pests that have been identified as serious threats to Tasmania.