The fish is reported to have given Christians a simple means by which to identify themselves as believers in a time of persecution. Some reports of its use date back to the end of the 1st Century AD and it is believed to predate the symbol of the cross. The Jesus fish is perhaps the earliest symbol for Christianity. In this age of technology, the Jesus fish can also been seen in web sites and personal emails as <. The fish also publicizes businesses that carry Christian items such as Bibles, books, and Christian music. The Christian or Jesus fish logo is also used in company and store ads to attract consumers looking for businesses that operate with Christian integrity and ethics. Those who want to identify themselves as followers of Jesus Christ often display the Jesus fish on things such as their key chains, car windows, and business cards. The Jesus fish is a symbol of Christianity that reemerged in popularity in the mid 1960's and can be seen today on everything from religious clothing to auto bumper stickers. Y – Upsilon or Yios/Huios - Greek for Son.IXИYУ is an acronym coming from the first letter of words that mean “Jesus Christ God’s Son is Savior.” The symbol is also known as an Ichthys (coming from the ancient Greek word for fish). The Jesus fish is a well recognized symbol consisting of two curved lines that resemble the image of a fish.