Alexander DuBrow

Alexander DuBrow is an antagonist in the ninteenth book in the Goosebumps series, Deep Trouble.

History
Alexander is introduced as the assistant to Dr. D. on his ship, The Cassandra. While claiming to be a science student, he does a lot of the heavy work on the boat and also cooks the food, however quite poorly. When Alexander and Dr. D get a request from a marine park owners to find a real life mermaid, with a million dollar reward on the line. Dr. D. agrees, but has reservations on putting the mermaid in captivity. Later on, Billy Deep finds the mermaid and the group manage to capture her, placing her in a giant tank.

A few nights later, Billy, his sister Sheena and Dr. D are attacked by masked men. It's soon revealed that Alexander was working for them all along. It turns out that he was seeking the mermaid to give to his bosses for a twenty million dollar reward. Alexander and the goons place the deeps in the giant tank and throw it off the boat. But the Deeps are rescued by the other mermaids. They catch up to the kidnappers and try to save the mermaid, only for their dinghy to be set on fire and the kidnappers. They manage to put the fire out as the kidnappers plan to throw them back into the water. Suddenly, the boat begins to rock as the mermaids are shaking it, freeing the young mermaid. The Deeps escape and the status of the kidnappers remains unclear.

Personality
Before his turn on the Deep family, Alexander comes off as friendly and unassuming, particularly toward Billy and Sheena. And despite turning on the Deeps, he claims that he had to turn on them or the kidnappers would have killed him.

Physical Appearance
Alexander is described as being in his early twenties. His height is 6'4. He's very muscular and tanned with wavy blonde hair, blue eyes and powerful hands.