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Why do sea creatures get electrocuted underwater?

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“Sea creatures” as well as other animals rely on electricity (action potentials) to control their muscles, including their hearts. Electric shock can make the muscles contract involuntarily. In marine waters (the sea), having a high salinity, the water is very conductive, so if a current is applied across e.g. a fish the current will have no problems reaching the fish and affecting it. read more

If freshwater, biologist etc. use generators to create a DC current that paralyses fish in order to do surveys etc. Larger fish are more affected than smaller ones, and if the biologist are unlucky enough and fall in the water, they act as a very large fish and will get paralysed too. read more

I’d hazard to guess that while a lightning strike at sea might indeed boil, electrocute, or otherwise rupture apart any unfortunate fishes at or near the surface, it ultimately doesn’t matter much for most species from a population level. read more

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