This art is for a children book, but i take the oportunity to congratulate the Christmas to all of you.
The twelve-star in the top represent the Israel tribes, and the number of apostles. Three of them are the Trinity also. The fish is the "Ictis", a christian symbol very usual in the first communities. The dove is the Holy Spirit.
"“Fear not, for behold, I bring you good news of great joy that will be for all the people. For unto you is born this day in the city of David a Savior, who is Christ the Lord." Luke 2, 10