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Why don't more sharks invade freshwater lakes and rivers?

Best Answers

Few animals make the move from saltwater to freshwater habitats; a slew of physiological and ecological barriers limits this. And for sharks, it's because. read more

Of the more than 1,000 species of Elasmobranchii (sharks, rays, and skates), only 5 percent can live in freshwater, and most of them do so part-time only. By comparison, Science explains, about 40 percent of bony fish (from goldfish to rainbow trout) live in freshwater. read more

The majority of shark species need salt water to live. The bull shark is one species that is able to tolerate brackish and fresh water and has been observed in freshwater rivers. read more

Encyclopedia Research

Wikipedia:

Image Answers

Bull Sharks In Freshwater | www.pixshark.com - Images ...
Source: pixshark.com

Further Research

Freshwater Sharks -- Say What?
animals.howstuffworks.com

Shark Attack … In a Lake?
www.livescience.com