Our cats love this fish and play quite rough with it. Thus the need for a replacement part.
Use the hardest to break filament you can print with. Petg is ok, but a nylon is better. I bet a firm tpu could be good as well. There are a couple types of these floppy fish out there, so this may or may not fit yours.
Drop-in replacement that works with existing hardware.
Our fish was purchased from “UPSKY” on Amazon.
The author marked this model as their own original creation.