Thanks very much to ckhmer1 for sharing the cool butterfly bookmark OpenSCAD design ( https://www.thingiverse.com/thing:4714929 ). I used the butterfly bookmark OpenSCAD code at that link to make a dolphin bookmark remix using the SVG from https://svgsilh.com/image/152992.html

and shifting it to where I wanted by changing line 11 to:
translate(v=[-29, 29, h/2])

Enjoy!