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Publication - Advice and guidance

Salmon farming - welfare at the time of killing: guidance

Published
17 July 2025
From
Minister for Agriculture and Connectivity
Directorate
Agriculture and Rural Economy Directorate
Topic
Marine and fisheries
ISBN
9781836918653

This guidance applies to Scotland only and is issued by the Scottish Ministers under section 38 of the Animal Health and Welfare (Scotland) Act 2006. It relates to the welfare of farmed fish at the time of slaughter or killing.

View supporting documents Supporting documents

ANNEX B – Indications of Recovery from Stunning

The most reliable and effective signs of recovery for salmon and trout are the return of the eye roll reflex (see images below) and the breathing reflex. Rhythmic movement of the operculum should be looked for, but take into account that apparently random and irregular movements can be, but not usually, a sign of recovery.

Signs of Recovery in Fish – The Eye Roll Reflex[1]

Conscious fish - eyes remain on the same plane
Conscious fish image: Drawing of conscious fish - detailing that the eyes remain on the same plane when rotated.
Unconscious fish – eyes remain fixed when in fish is rotated
Unconscious fish image: Drawing of a unconscious fish detailing that the eyes remain fixed when the fish is rotated.

Contact

Email: animal.health@gov.scot

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