What’s up with the Christian fish?

My friend likes to say “When you see the fish, hang onto your wallet” but it led me to wonder why the fish is the symbol of Christians (which by the way, I’m not)

The fish outline is a logical symbol for the early Christian church to adopt. Fish play a major role in the gospels. For example:

Mark 1:17: “Come after Me, and I will make you become fishers of men.”

Matthew 12:40: “…Jonah was three days and three nights in the belly of the great fish, so will the Son of Man be three days and three nights in the heart of the earth.”

Matthew 14:17: “And they said to Him, ‘We have here only five loaves and two fish.'”

Luke 5:6: “And when they had done this, they caught a great number of fish, and their net was breaking.”

Luke 24:42: “So they gave Him a piece of a broiled fish and some honeycomb.”

John 21:6: “And He said to them, ‘Cast the net on the right side of the boat, and you will find some.’ So they cast, and now they were not able to draw it in because of the multitude of fish.”

1 Corinthians 15:39: “All flesh is not the same flesh, but there is one kind of flesh of men, another flesh of beasts, another of fish, and another of birds.”

Some Christians believe that a second link between their religion and the fish symbol is seen in the Greek word for fish (ichthus, spelled: Iota Chi Theta Upsilon Sigma). That is an acrostic which has many translations in English. The most popular appears to be “Jesus Christ, Son of God, Savior” [Iesous (Jesus) CHristos (Christ) THeou (God) Uiou (Son) Soter (Savior)].