The fish are plastic physics
Sorted into left and right spin direction; speeds 8, 6, 4, 2, 1, 0.5, 0.25, 0.1, 0.05, 0.02 seconds per complete rotation (and also a non-spinning one)
Made using Editor++; 3d model from https://item.mania.exchange/item/view/92834 (thx XertroV for converting that to a mesh I could edit)