This is fish(mackerel) shaped paperclip/bookmark.

Currently I have 3 type clips, 1.0mm thickness type, 1.5mm thickness type and 1.75 mm thickness type. I recommend to use 1.5mm type or 1.75mm type for paperclip(documents, memo) , 1.0mm type for bookmark.(1.5mm type or 1.75mm type may too strong for bookmark).

-Files 1.0mm thickness type : saba_clip_1_0mm.stl 1.5mm thickness type : saba_clip_1_5mm.stl 1.75mm thickness type: saba_clip_1_75mm.stl

I just tried only use ABS so far, and it works.

Base design: https://www.thingiverse.com/thing:4030879