Harbour seals may be able to detect fish up to 100m (328ft) away using only their whiskers, say scientists. Researchers used an artificial fish in their experiment, to create a "trail" in the water that a seal could detect.

The described how a trained seal, named Henry, was able to indicate, with a twitch of its head, whether the fish moved to the right or to the left.

The team described the study in the Journal of Experimental Biology.

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