The trio of brave friends who make up Sharks, Inc--Luke, Maribel and Sabina--dive back into adventure in Megalops, the fourth book of bestselling author Randy Wayne White's Sharks Incorporated series.

The Tarpon Anglers Rodeo is back in Sanibel Island, and Doc Ford is watchful of the million-dollar competition. When Lucas O. Jones notices a boat rigging a net to injure fish, Doc and Luke are certain there's something wrong happening behind the scenes.

The kids of Sharks Inc. have a special talent of finding themselves in odd situations. So when they stumble onto a private island protected by a gate, "No Trespassing" signs, and three scar-faced dogs, they ask a detective to visit the island, but find it empty when police arrive.

Convinced something illegal is happening, Luke, Maribel, and Sabina return to the island, where they discover the truth behind one celebrity's success at the tournament. There, they not only have to run for their lives, but must also try and save a world record tarpon from dying.