No, it's not a fossil. It's a snack! It's a crispy rice cracker with a small dried squid pressed inside.
Here's a close-up of the squid. Little Brother's friend brought a box of these crackers back from summer vacation for us. We still have some left.
Peanuts, pumpkin seeds, sunflower seeds, dried berries, and black soybeans make up this snack.
Small dried fish. These were Big Sister's favorite when she was a toddler. She wouldn't eat them without their heads. I think it was because Baba told her that "fish heads are good for your head" (brain).