A group of people trying to electrofish fish out of water at a BioBlitz in Cambridge, Ontario © David Coulson conservation photojournalist
Electrofishing is a common technique used by fisheries biologists to sample fish to determine abundance, density, and species composition. The process does no permanent harm to fish, which return to their natural state in as little as two minutes after being caught. rare Charitable Research Reserve, BioBlitz 2017.