Goldfish can survive for months at a time in oxygen-free water. They convert lactic acid into ethanol which keeps them alive under frozen lakes.
A little bit of alcohol probably means they lose their inhibitions too. Goldfish and carp produce at least 50 mg per millilitre in their blood.
“This puts them above the legal drink drive limit in most countries“, lead researcher Michael Berenbrink said.
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Pass it on: New Scientist