Whale

The Whale is a minor character and location from Disney/Pixar's 2003 animated film, Finding Nemo.

Background
This whale is the largest character in the film. Upon leaving the EAC, Marlin and Dory get trapped inside the mouth of a blue whale after swimming into its path. Marlin reluctantly trusts Dory, who tries to speak whale, and allows himself to be ejected from the whale's blowhole at the risk of being eaten. Fortunately, they are carried to Sydney Harbour in the process.

Finding Nemo
In Finding Nemo, the whale is first seen from a distance before he reveals how large he is. Dory starts speaking whale to try and ask him if he can help them find Nemo, but the whale ends up swimming away. But then slowly (and rather ominously) he swims up behind Marlin and Dory (also scaring some krill, who tell the two fish to swim away), and swallows Marlin and Dory whole. Later, while Marlin struggles to get out, Dory tries to speak to the whale again. In reaction, the whale ejects the two fish from his blowhole at a convenient location which happens to be Sydney. The whale theoretically understood Dory and helped her and Marlin get to their destination.

World of Color
The whale appears in the show's version of the sequence of Dory speaking whale and is the lead-in to the Pines of Rome sequence.

Trivia

 * Blue whales have black baleen plates and tend to be larger. And while the whale has a uvula hanging above his soft palate, whales don't have uvulas at all. (However, this was an intentional mistake by the filmmakers, as they felt audiences would see that Marlin and Dory were inside the whale's mouth if it had a uvula as "stage dressing.")