01 · AquaGrow
What it is
Contaminated material can move between hatchery areas without obvious signs. Shared wet equipment, staff movement and water routes need control. A breach is a reason to investigate, not proof that every contacted batch is infected.
Signs to watch for
- Tools or containers cross between designated areas.
- A clean-to-dirty movement rule is missed.
- Problems appear in units with linked people, water or equipment.
Common causes
- Equipment is not dedicated or properly cleaned.
- Quarantine and production routes overlap.
- Training, labelling or movement records are incomplete.
How to confirm the cause
- Trace tools, workers, water and live-feed movements against the event timeline.
- Ask the health professional to define exposed lots and an appropriate sampling plan.
What to do immediately
- 1
Stop the uncontrolled movement and separate clean and suspect equipment.
- 2
Inform the hatchery manager and health professional; retain exposed-lot identities.
- 3
Follow a verified cleaning and movement plan. Do not return suspect stock or water to clean units.
- 4
Check exposed tanks and obtain a release decision before dispatching unresolved suspect lots.
Prevention: your practical checklist
- Use dedicated, labelled equipment and clear area boundaries.
- Train and document clean-to-dirty workflows.
- Keep visitors, waste and water movement under the biosecurity plan.
When to call an expert
- Seek immediate assessment if linked tanks develop deaths or a target pathogen is detected.
- Get advice after any breach involving quarantine or known suspect material.
Farmer questions
Do healthy-looking larvae prove a breach was harmless?
No. Appearance alone cannot establish pathogen status. Define exposures and follow the professional’s monitoring and testing plan.
Can I dip every tool in the same chemical bucket?
Do not assume a shared bucket is effective or safe. Cleaning, product suitability and verification need a defined procedure, not an improvised dip.
Should I declare every exposed lot infected?
Do not make an unsupported diagnosis. Keep the lots traceable, restrict unresolved movements and let the health professional assess exposure and testing.
Sources & further reading
AI-assisted educational content and translations, source-checked 17 October 2026. Not an individual diagnosis or prescription. Independent aquaculture-health and native-language specialist approvals have not been supplied. Sources do not endorse AquaGrow.
- SHAPHARI hatchery operating guidelines — production, biosecurity and records ↗MPEDA; linked guideline, not AquaGrow certification or a legal-compliance audit
- Hatchery health management: quarantine, testing and production-stage separation ↗FAO; historical Asia–Pacific framework, not current Indian import rules