Peggy, from the purple bar at the top of the page there will be a drop-down menu under THE FORUM.

Click on "find a quilt">
enter the "name of pattern or block" in the appropriate box>
click "submit"

Here is a shortcut to the function: /

I would try searching for the theme (e.g. turtles) by the quilt name, then the quilt pattern and then the description.

Is there no way to just search all the quilts in the gallery by theme? I am making a swap block and I like to look at what others have done for inspiration. I didn't see a way to search by theme.