From ancient times, the fish has been associated with Christianity. The Greek word for fish is ichthys. From the beginning Christians made an acronym from it: Iesous Christos Theou Yios Soter, which means Jesus Christ, Son of God, Saviour. In Scripture we find a number of references to fish. For example, Jesus fed five thousand men with two fish and five loaves. He also called his disciples ‘fishers of men’. Tertullian uses the Ichthys symbol to compare Christians to fish, since they were born of water into Jesus Christ. In the Gospel according to St Matthew, Jesus says: “the kingdom of heaven is like a net that was thrown into the sea and caught fish of every kind” (Mt 13:47).
After his resurrection from the dead, when Jesus appeared to his disciples on the shore of the sea of Galilee, we find Simon Peter on his boat bringing back to land a net containing one hundred and fifty-three large fish: “Simon Peter went aboard and hauled the net ashore, full of large fish, a hundred fifty-three of them; and though there were so many, the net was not torn” (Jn 21:11). Why does the evangelist specify that there were one hundred and fifty-three fish caught in the net? St Jerome in the fourth century writes that this number symbolises all species of fish, and therefore signifies that there is a place for everyone in the Church. It is also interesting to note that if we were to count the number of times Jesus blessed various individuals in the four Gospels, it would amount to one hundred and fifty-three people, on forty-eight different occasions.