Fish Net Stitch is used for covering spaces effectively, the same way Lace or Honeycomb Stitches are used.
How to work:
This stitch is made in the same way as the Honeycomb Stitch with this exception: the stitches of all the rows except the first and last are taken through the loops alone, not through the fabric. Each succeeding row draws down the loops of the preceding one. Be sure to make the loops very loose. See illustration below.
Click on picture to see more detail.
The first and last stitch of each row must, however, be taken through the material to secure the row. Make as many rows as are necessary to fill the space. Finish with a final row of Blanket Stitch to secure the net. If the item will not receive any friction, such as a wall hanging, securing only the first and last stitch of the final row is necessary, leaving the last row of stitches free to hang.
Note: Reverse the needle when stitching through the loops to avoid splitting the silk.