Deep Trouble II

Deep Trouble II is the 58th book of R.L. Stine's Goosebumps series. It is also the sequel to the nineteenth book, Deep Trouble.

Plot
Billy and Sheena Deep return to their Uncle, Dr. Deep's small island in the Caribbean, where they encountered a mermaid once. They soon discover that the local fish have more than doubled in size, and have an appetite for humans!

On TV
In the TV series, the creation that turned the fish bigger is called D-13. Also, in the episode, there are various creatures that suffered from D-13: Blowfish (At Dr. Deep's Lab), crab (on an island), lizard (on the island), and several humans. Though it causes fish to overgrow, it causes humans to turn into part sea creature part human creatures. Note: This episode was called Deep Trouble, but it is based on Deep Trouble 2. There hasn't been an episode based on Deep Trouble 1.