The ocean isn't the only place where behemoth fish can be found. Hidden beneath the murky waters of our freshwater rivers and lakes, there are monsters swimming unseen.
While most freshwater fish are smaller than counterparts in the salty ocean, there are some that can grow to mammoth sizes. You may think twice about that dream of one day catching "the big one" after you take a look at these freshwater giants.
Here are the largest freshwater fish in the world.
Editor's note: This gallery has been updated since it was published in October 2010.