Crush is a sea turtle who speaks in the manner of a surfer dude. He helps Marlin and Dory get to Sydney Harbour to rescue Nemo. His nicknames for Marlin and Dory are "Jellyman" and "Little Blue", respectively. After he transports Marlin and Dory to their destination to find Nemo, Marlin asks Crush how old he is to which he replies, "150, dude, and still young!" Probably. the best way to describe Crush is a surfer punk who loves and cares for his son, Squirt.
When it comes to traveling the ocean's currents, no one has as much fun as Crush. The 150-year-old sea turtle is young at heart with a laid-back surfer dude attitude that lets him go with the flow. But Crush is no drifter; he loves nothing more than the thrill of riding the rollicking East Australian Current (EAC) with his offspring. When Crush encounters Marlin and Dory, he's more than happy to help them find their way, provided they can hold on for the wildest ride of their lives.
Having escaped from the jellyfish forest, Marlin and Dory end up in the East Australian Current where Crush tells Marlin to focus when on the current where he explains that escaping from the jellyfish was not easy. Crush introduces himself to Marlin to which Marlin tells him that he needs to get to the EAC to which he explains to him that he is on the EAC, telling him to look at the other sea turtles swimming in the current. Crush then tells Marlin to hang on as he and the other turtles are approaching a strong current. After hanging on, Marlin tells Crush to help him and Dory help find Nemo at Sydney Harbour. Crush later watches Dory playing with the baby sea turtles in the current much to Marlin's enjoyment. Thinking Squirt is about to be lost in the sea, Crush tells Marlin to observe Squirt's solo in getting into the current by himself. When Squirt swims into the current by himself, Crush is proud of his son for conquering his fear of getting in the current without an adult sea turtle's help to which Crush introduces his son to Marlin. Crush explains that sea turtles leave eggs on the beach for them to hatch and when they hatch, they find their way back to the ocean independently. While still on Crush, Marlin explains to the small sea turtles about his tragic story about Nemo to which the sea creatures tell the story about Marlin's search for Nemo.
The next day, Crush transports Marlin and Dory to their destination to help find Nemo, telling them to get ready to hang on during another strong current to which he tells them about Squirt doing a proper way to exit the current; Squirt explains to the two fish to be careful when on the current and hang carefully. Just as Marlin and Dory leave the current, Crush tells the two to have a great time looking for Sydney Harbour. Crush and the small turtles then bid a farewell to Marlin to which he explains that Nemo would have loved this experience if he were here. Telling Crush of how old he is, Crush replies that he is 150 years old just before leaving while Marlin keeps the age of how old Crush is to tell Nemo about his experience in meeting a sea turtle.
Crush returns in the sequel Finding Dory, this time as a minor character. In this sequel, he only makes a brief appearance where he and Squirt help Marlin, Dory, and Nemo get to Morro Bay, California in order to find Dory's parents Charlie and Jenny. While Marlin, Dory, and Nemo hang onto Crush, they arrive at their destination in a sunken wreckage where he and Squirt wish the three good luck into helping Dory find her missing parents. Crush and Squirt are never seen again throughout the rest of the film after they transport Marlin, Nemo, and Dory to their destination.
He appeared on the PBS Kids Go! show, FETCH! with Ruff Ruffman, in the season 5 episode "The Ol' Shell Game." In that episode, it is Crush's birthday, so Ruff gives him a call. During that call, Crush tells Ruff about trouble happening with turtles, so Ruff sends Marco and Shreya to learn about sea turtles. At the end of the episode, Crush thanks them for helping the sea turtles and says that it was the best birthday present ever.
Based on the fact that Crush's father is named Mr. Turtle, this would make Crush's full name Crush Turtle, or C. Turtle (sea turtle) for short.
It is implied that Crush's (and to a lesser extent, Squirt's and the other turtles') home is actually Hawaii, and he and the other turtles are using the EAC to return there.
According to the Guinness Book of World Records, sea turtles can actually live up to 152 years. This contradicts what Crush said about still being young at age 150, it could be possible that he feels young instead of literally young.
Crush makes a cameo appearance in the Pixar short, Lava.