Lead the biosecurity response to a suspected disease in cage 12
You are the Leading Hand responsible for the cage 12 biosecurity response.
What has happened
Cage 12 mortalities have risen from six a day to over twenty in three days, with fish flashing and showing pale gills. The Sea Farm Manager has isolated the cage under the Biosecurity and Stock Health Policy and the veterinarian has sampled ten fish, with laboratory results due on Saturday. Movements between cages have been stopped, but crews are busy with feeding, net cleaning and a harvest planned for cage 5, and the manager is not confident every boat is following the disinfection rule. If the disease is notifiable, the regulator must be told and movement controls will widen. No treatment can be given without veterinary direction and the Chemicals and Treatments Register must be checked. You have been asked to run the response and brief the crews.
Deliverables
- A mortality trend chart and log review summary
- A movement and disinfection audit with any breaches recorded
- A notifiable disease notification pack
- A completed Toolbox Talk record
- The updated cage 12 emergency log entry
Documents to use
Systems to use
Farm Stock and Water Quality Log
Records daily water quality readings, feed, mortalities, observations, movements and health events for every sea cage and hatchery system.
WHS Incident and Hazard Register
The controlled record of injuries, near misses, hazards, spills and vessel and vehicle incidents across all sites and vessels, with investigation and corrective actions to closure.
Units of competency
Current on training.gov.au for the Seafood Industry as at 10 September 2026.
SFIBIO401Apply aquaculture biosecurity measuresSFIAQU315Apply control measures for diseasesSFIAQU411Develop and implement a stock health programSFIAQU303Monitor stock handling activitiesSFICPL307Facilitate effective communication in the workplaceQualifications
SFI30119Certificate III in AquacultureSFI40119Certificate IV in AquacultureWhat to look for
Evidence guide
Assess whether the student understands the movement control logic and audits it honestly, interprets the mortality and water quality data sensibly, respects the rule that treatment needs veterinary direction, prepares an accurate notification pack, protects the cage 5 harvest with specific controls, and runs a clear toolbox talk. The emergency log entry should read as a real incident record.