Police are hunting for the culprits who deliberately turned off a compressor at Glen Wyllin Trout Farm, killing all of the fish.
The incident happened on Monday, June 11 at approximately 2.30am.
The compressor regulated the oxygen levels in the water where the fish were stored, when the levels depleted all of the animals perished.
If you have any information you're being asked to contact Peel police station.
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