The fish was a symbol used by early Christians to identify themselves to each other. Here, a stream of fish is pictured inside the symbol of the cross.
Scripture printed inside card:
"He that believeth on me, as the scripture hath said, from within him shall flow rivers of living water." John 7:38
This card is also available as a 10-Pack:
401 w/Scripture The River of Life (10-Pack)
Or, as one of the cards included in the following 4-Pack Gift Set:
C-4 Set w/Scripture Crosses