This flatfish is designed for my Magnetic Fishing Rod: http://www.thingiverse.com/thing:356919
It takes single 6.4x6.4mm Rare earth magnet.
I have printed it easily using ABS and HIPS supports on my Replicator 2X.
Resolution 0.2mm, 2 shells, 10% infill.
I will add the link to other creatures once all files are uploaded.