The Sea Monster is the fourth episode of Scooby-Doo! And The Paranormal Adventures.
The gang goes to Florida to have some time off from school. They see the beaches deserted. They meet a couple, Chase and Kelly. Chase and Kelly tell them that the beaches are closed because of the sea monster. According to the Miami legends, the sea monster nearly destroyed Miami, but the monster has been drowned into the bottom of the sea because it was vulnerable to being on dry land for a long time. The monster wasn't seen since then. The monster was believed to have died, but it came back to life. The gang decides to find the sea monster. Chase and Kelly explain that the monster rised from the sea and the gang dives down to the sea to find the monster. The sea monster appears behind the gang. Scooby and Shaggy try to swim back to the surface where they'll be safe. Daphne gets captured by the monster and is swallowed. The monster then escapes. Much to Scooby and Shaggy's dismay, the gang decides to enter inside the monster to save Daphne. The monster appears again. The monster swallows Fred and Velma and goes after Scooby and Shaggy. Scooby and Shaggy try to escape. Inside the monster's stomach, Fred and Velma find Daphne and now the three of them try to escape from inside the monster. Scooby and Shaggy get back to the surface and the monster follows them. The monster now chases Scooby and Shaggy around the beach. The monster suddenly stops and starts to act weird. The monster starts choking and spits Fred, Daphne and Velma out. The monster then evaporates because Scooby and Shaggy had it on dry land for a long time trying to escape. With the monster gone, the beach is opened again and the gang now has some fun on the beach.