No, it is not because Christ supposedly fed 5,000 worshipers with two fish and five loaves of bread. Nor is it because Jesus called his disciples “fishers of men.” In fact, it comes from the acronym for “Jesus Christ, Son of God, Savior,” in Latin: Iesous Christos Theou Yios Soter. Combining the first letters of the words you get Icthys, Greek for fish. And to be historically accurate, the cross was not the symbol for Christians until the Third Century. Before that, the symbol was the ankh, which the Coptic still use it as their ‘cross .’
