The freshwaters of Earth today may seem like a scary place to some individuals. Afterall, depending on where you live, you may have to worry about sharks, alligators, or crocodiles when swimming in a river. However, those guys are all chumps, when compared to the real river monsters, the Rhizodonts, a group of giant predatorial fish that terrorized the planet over 300 million years ago and also became the largest freshwater fish, the Earth has ever seen.

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Joschua Knüppe

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