Final answer:
In 'Finding Nemo', Nemo is taken to a dentist's office aquarium in Sydney, Australia. Marlin, his father, embarks on a journey to rescue him.
Step-by-step explanation:
In the movie Finding Nemo, the young clownfish named Nemo is taken from the Great Barrier Reef and ends up in an aquarium in a dentist's office. This office is located in Sydney, which is in the country of Australia. Following Nemo's capture, his father, Marlin, sets out on an ambitious and adventurous journey across the ocean, facing various challenges along the way, to find and rescue his son.