Dorothy is Elmo’s pet goldfish in Sesame Street and appears frequently in the Elmo’s World episodes Sleep and Teeth.
Gallery
Dorothy making a really cute face
Elmo watching Dorothy from her fish bowl
Elmo looking to the right and Dorothy
Elmo introduces Dorothy
Elmo and Dorothy
Dorothy swimming in her fish bowl as usual
Elmo and Dorothy in Sleep
Even though Dorothy is not shown on this picture along with Elmo’s plush toy Baby David
Elmo hugging Dorothy
Dorothy can be seen on the right in this picture
Elmo as a pet goldfish with Dorothy
Elmo looking at Dorothy's cousins and a red fish underwater as a scuba diver