Why isn't miss chatham in season 2 of h2o?

Miss Chatham, portrayed by actress Caroline Craig, does not appear in Season 2 of "H2O: Just Add Water" due to a shift in focus towards the main characters and their evolving storylines. The producers opted to streamline the cast and concentrate on the central trio, Cleo, Emma, and Rikki, as they navigate new challenges and relationships. This creative decision also allowed for the introduction of new characters and plot developments that aligned better with the show's direction.