Real, in an unreal world.

I don't understand what is the sense of reality sometimes. Many say that reality is the actual existence of something or someone. Others say it is what we perceive or see as real in this world. But am I not real? How can they say that they have never seen a cat talking, much less with a jellyfish as a pet. It is something so real, as if judging the life of each one is right and not wrong. ¡Unrealists!