Changed the original entry to my plan B album, because the high key landscape picture, didn't blend in the calendar view. ;-) So this is a late registration. It's a heart sea urchin shell/skeleton (Loveniidae), probably from a Breynia australasiae.
BZ`TW: can you see the little cat's face in the middle?
For the flash of red month, theme week 1: forms in nature. heart, star, symmetry.