Lord Narayana, the four primary expansions [Vasudeva, Sankarshana, Pradyumna and Aniruddha], Matsya and the other lila incarnations, the yuga-avataras, the manv-antara incarnations and as many other incarnations as there are -- all descend in the body of Lord Krishna. In this way the complete Supreme Godhead, Lord Krishna Himself, appears.