Yes. He loved his son very much. Well on the first day of school, Nemo and his friends strayed away from class to explore. Marlin, worried about Nemo, went to track down the class. When the dad arrived he had an argument with his son about how dangerous it was to be in the ocean. To prove to his dad that he could handle himself, Nemo swam up to a boat and touched it.

But after that Nemo was captured by a couple of divers.