Remixed this for larger size, makes a complete fish, includes a stand, optimized for printing.
8mm (1/4 in) alignment holes ensure a perfect fit when gluing together.
I printed this in glow in the dark ABS.
Thanks ELIJAHXXL for the great work on the original.

Sliced at .15mm thickness and 15% infill.
Insert 3/4' long 1/4' dowels into the alignment holes on one half.
Glue together with Krazy Glue or other ABS compatible adhesive.