Summary

Yellow Tang decoy fish to reduce aggression towards real fish. If you print these right, they'll float and you can attach a fishing line between the decoy fish and a rock to mimic the behavior of real fish, as shown in the animated gif. I just used sharpie to color in the eyes. Scale these up to roughly match the size of the aggressive fish. The model with holes has tiny holes in the upper and lower fins to attach fishing line. These holes are tiny and might need to be enlarged with a thumbtack or something if your print settings are a bit loose.

Print Settings

Printer Brand:

Creality

                                            Printer:                      
Ender 3

Rafts:

                                            Supports:                      
Yes

Resolution:

0.2

                                            Infill:                      
0.2

Filament: Hatchbox PETG
Yellow

                    
                        Notes:                     
I recommend printing these in PETG since it's more resistant to the effects of saltwater. Print with the mouth pointing downwards, and add a support around it to keep it from tipping during the print.

fish

reeftank