The wind was gone and so were the waves. I looked for something to play in and I had to content myself with a small "zipper".
It's when two waves from different directions collide together at a slight angle and form this imaginary zipper that appears to close together. The bay I often paddle has decent tidal flows that create banks of sand miles away from shore. Leaving the fishing folk behind, I played around in the shallow water trying to get caught in the zipper zone.