Irene

Irene was DJ's pet fish that he owned during Newf Kids on the Rock and Jamaica Me Sweat, but then found out that Alejandro was using her to trick him.

Total Drama World Tour
In Newf Kids on the Rock, Irene is given to DJ when he is instructed to kiss a cod for the final challenge. He refuses to do it at first, because he is trying to eliminate himself due to his "curse," which has led to the continual injuring of animals, to end. He also believed that he would bring harm to the cod if he made contact with it because of the "curse." Heather then points out that the fish has an Egyptian symbol on it, telling DJ that the fish might be able to end the curse. DJ refuses at first, but finally listens to Heather when Alejandro agrees with her and says that DJ should do it for the good animals of the world. DJ then kisses Irene, and ties with Tyler and his team in the challenge of this episode. It is then revealed that, afterwards, he goes two hours without hurting an animal. This convinces him that the curse truly is broken and that Irene is his lucky charm. This also leads him to believe as long he has her, his curse no longer takes effect. At the end of the episode, it is revealed that Alejandro had painted the Egyptian symbol on Irene in order to gain DJ's trust, and his thought that his curse was over.

In Jamaica Me Sweat, DJ is seen carrying Irene with him in a bowl throughout the episode, as he sees the fish as a good luck charm. He takes it everywhere he goes, including the confessional, and when he participates in the challenge. In the first challenge, DJ accidentally knocks Irene off of a cliff into shark and eel infested water, but jumps off of the cliff and saves her before she lands. Because DJ is too preoccupied with Irene's safety, he fails to gain the advantage in the second challenge. During this second challenge, DJ goes through the bobsled course with Irene and finishes with the two fastest times out of everyone. Before the third and final run, Alejandro tells Tyler quite conspicuously that he painted the Egyptian symbol on the fish, intending for DJ to hear it. Upon "accidentally" hearing this, DJ loses his confidence and believes that he's cursed once again. Due to this, DJ loses focus during the challenge and hits many animals on the course. This causes him to lose the challenge and be eliminated from the competition; she is not seen again.

Trivia

 * Irene is known to be DJ's fourth pet, after his first and second bunny in Total Drama Island, and Vince, the alligator that DJ had owned before he competed in Total Drama.
 * Irene is DJ's only pet in Total Drama World Tour.
 * Total Drama Action, Total Drama: Revenge of the Island, and Total Drama All Stars are currently the only seasons that DJ does not have a pet.
 * Irene is one of four pets adopted by a contestant throughout the series. The others being Bunny (by DJ) in The Sucky Outdoors, Leshawna, Jr. (by Harold) in Crouching Courtney, Hidden Owen, and Cody, Jr. (by Sierra) in Rapa Phooey!.
 * Irene is the fourth animal to be named in Total Drama World Tour. The others being Ruby, Ting-Ting, and T'sing-T'sing, and Bruno.