Pixar Swimmer is a reference to the character Nemo from the 2003 Pixar animated film 'Finding Nemo'. Nemo is a young clownfish who gets lost in the Great Barrier Reef and embarks on a journey to find his way back home. He is accompanied by his father Marlin and a forgetful fish named Dory. Nemo's bravery and determination to reunite with his family makes him a beloved character in the Pixar universe.