This is the super fish for deco your new year 2019, even if some see a shark !! See the paper folding on https://www.youtube.com/watch?v=BRElp2yn7o0 the paper model is named Origami Simple Koi.

The model sized scale 1 for A4 paper . Use x2 for A3, but do not try A5 paper with this model. You can add a 5mm cube magnet to stick it everywhere. Use miror function for the tail to go left,

If you use orthogonal printer, Optimized your Gcode with adding near Z30mm : M221 S120; set flow printer in %
M220 S60; set speed printer in %