AOL.COM - On ‘River Monsters', Jeremy Wade heads to a place he's never been -- Russia, in search of a beast that's rumored to have killed three men on a fishing trip. Wade learns the monster seems to be the Kaluga sturgeon, a predatory fish that can grow to 1,300 lbs and 15 ft. long. The Kaluga has been fished almost to extinction because its caviar is worth so much. Now, organized crime is in control. click here to watch the video