Creep from the Deep (Goosebumps Horrorland)

Welcome to HorrorLand - do you dare enter?Billy and his sister, Sheena, unwittingly dive into a terrifying mystery when they accept a surprise invitation to HorrorLand - the amusement park that always lives up to its name. But first Billy and Sheena must sink or swim aboard a doomed ship that happens to be underwater - with a captain who happens to be dead. At least, he used to be!