Generally speaking, dreaming about dolphins is not a good thing. The appearance of dolphins in your dream means that you are in debt.
Originally, neither of them had any good meaning. However, when the two appear together, there is another solution. The sea is where dolphins live, and jumping dolphins symbolize a happy and smooth life. So this is a dream that indicates a turning point, indicating that there will be room for improvement in your next life and greater progress in your studies.