This sound is from Dory (Finding Nemo) Soundboard

Dory is a fictional blue tang and a major character of the American animated film series Finding Nemo. Various merchandise of the character have also been produced, including action figures and toys produced for McDonald's Happy Meals. The character is voiced by Ellen DeGeneres and by Jennifer Hale in tie-in media.
See also: Finding Dory, Finding Nemo (franchise), Finding Nemo, Finding Nemo (video game), Finding Nemo Submarine Voyage, and Finding Nemo – The Musical.