JESUS Fish Symbol - Christian Symbol

Vibrant, colourful, modernized Christian fish symbol with Jesus Text. The fish is the earliest known Christian symbol. To Christians it means; Jesus Christ, Son of God, Saviour. The ancient symbol was a secret symbol, but we have blazoned the fish with the name of Jesus to give this unique "Jesus Fish" for 21st century Christian.  This design is partly transparent, which means the design's color will conform to any background color.

Why do Christians use the Christian Fish Symbol?