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Fish behaviour

Goldfish produce alcohol to survive the winter

A new study of how goldfish survive frozen winters without oxygen by producing alcohol may shed light on alcohol resistance mechanisms.

Happy salmon swim further

Some salmon are nervous nellies and apprehensive about swimming far out to sea, but not so if they can get a boost from anti-anxiety drugs.

Female fish lose interest in colourful males

Norwgian researchers made a surprising discovery when they followed the mating habits of damselfish on the Great Barrier Reef.

Goby behaviour says much about sexual selection

One fish off the coast of central Norway has set a record for the number of female mates it had. And that’s not all.

Atlantic cod recovers quickly after catch-and-release

Atlantic cod recover quickly if they get fished in shallow water, are handled properly and released immediately after capture.

Scientists shock cod to gauge pain

Tests on Atlantic cod could lead to a discovery of whether fish simply react to harmful stimuli or actually feel pain much as we do.

Monitoring the movements of sea trout

The sea trout populations of central Norway have declined by as much as 60 percent. Researchers are trying to find the causes.

Wild salmon can adapt to climate change

Atlantic salmon are more capable of withstanding temperature changes than scientists had thought.

Fish choose a collision course

Flying insects steer away from objects to avoid collisions, but fish swim toward them at full speed.

Fishing: Big increase in catch-and-release

Anglers have in the last few years become steadily more likely to release their catches after reeling them in. Most of these fish survive the ordeal, but it is far from painless.