Audio figure for the Toniebox: Disney - Finding Nemo. "The ocean is dangerous," warns Marlin, the little clownfish, to his son Nemo. Since Nemo has a weak fin, he needs to be especially careful. When Nemo tries to prove to his father how well he can swim, he gets captured by a diver and placed in an aquarium. Brave Marlin sets out to search for his son and experiences a lot of adventures in the open ocean, just like Nemo, who also makes new friends in the aquarium.