A clown fish named Marlin living in the Great Barrier Reef loses his son, Nemo, after he ventures into the open sea, despite his father s constant warnings about many of the ocean s dangers. Nemo is abducted by a boat and netted up and sent to a dentist s office in Sydney. So, while Marlin ventures off to try to retrieve Nemo, Marlin meets a fish named Dory, a blue tang suffering from short-term memory loss. The companions travel a great distance, encountering various dangerous sea creatures such as sharks, anglerfish and jellyfish, in order to rescue Nemo from the dentist s office, which is situated by Sydney Harbor. While the two are doing this, Nemo and the other sea animals in the dentist s fish tank plot a way to return to Sydney Harbor to live their lives free again.