This big blue stingray is Nemo's first teacher. His students seem to love him and he's pretty good and his job. (Did your science teacher ever write a song about the zones of the ocean? We thought not.)
Though Mr. Ray assures Marlin that Nemo's safe exploring the reef with him, the worried clownfish father's totally hung up on the idea that no one else can look out for his son quite like he can.