Ichthys Christian Fish Medallion Basic - Ready To MintIchthys Christian Fish Medallion Sponsor this medallion and you will receive 3 with your order. See our policy on Custom Medallions for more information. The Ichthys, often called the Christian Fish, is one of the oldest and most recognizable symbols of the Christian faith. In the earliest centuries of Christianity, believers used this simple symbol as a quiet sign of shared faith. During times when Christians faced persecution, the Ichthys allowed