Its a Rubber Ducky with a Santa Hat!
Its a remix of a rubber duck from https://www.printables.com/model/68384-duck-duck-gray-duck/files.
a remix of Santa Hat from https://www.thingiverse.com/thing:5330
**update added a version with solid hat and a loop to hang from tree.
The author remixed this model.
The Duck is now Santa Duck!