Deb (the voice of Vicki Lewis) seems to be one of the only sane fish in the tank until she introduces her "sister" Flo. She advises Nemo not to listen to anything her "sister" says because she's crazy, unfortunately for Deb, Flo is just her reflection.

Four-Stripe Damselfish are also known as Blacktail Dascyllus, Blacktail Damselfish, or Blacktail Humbug. They have three alternating black and white vertical bands that make up the body coloration with a fourth black band ending at the tail. They are small fast fish and come in many different colors and patterns.