Is Deb Dori's sister in Finding Nemo?

Yes, Deb is Dory's sister in "Finding Nemo." However, it's important to clarify that Deb does not appear in the film; she is mentioned in the context of Dory's backstory. Dory, a regal blue tang, has short-term memory loss and recalls her sister during her journey, emphasizing her longing for family and connection.