P.salmonis
The significant salmon mortailty event that occured in the D’Entrecasteaux Channel in early 2025 was caused by an endemic bacteria known as Piscirickettsia Salmonis (P.salmonis).
The presence of this bacteria has persisted and remains in Southern Tasmanian waters.
P.salmonis does not present a human health, or food safety risk. The bacterium also does not pose a risk to freshwater fish nor is it known to pose a threat to other marine (saltwater) species.
Piscirickettsia salmonis Information Sheet (PDF 131Kb)
NRE Tas is working together with the EPA and the salmon industry on a range of measures to reduce the impact of P. salmonis.
Antibiotic use
Antibiotics are not routinely used by the Tasmanian salmon industry. When they are required, they are prescribed by a company veterinarian in accordance with legislation.
If fish require antibiotics, companies must advise the EPA Director and the Chief Veterinary Officer prior to administration and comply with any requirements for testing residues and reporting. Veterinary medications are registered and monitored on a national level.
Florfenicol is an antibiotic that has been identified as an important tool to combat the impact of P. salmonis and protect the welfare of salmon. Florfenicol is widely used in aquaculture around the world and has many advantages over other veterinary antibiotics.
Florfenicol Regulator Notice
Information about the administration of florfenicol and it's regulation is available in the Regulator Notice: Antibiotic Treatment - Administration of Florfenicol.
Florfenicol frequently asked questions are also available.
Current treatment locations can be found at: LISTmap - Land Information System Tasmania