The Whale is a minor character in 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) 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.