Beginner Gardening: Help with cactus identification, 1 by WonderWeasel

WonderWeasel wrote:
Hello--

I started a few cactus seeds from a variety pack back in March. Initially, the seedlings all looked very similar, but now they are starting to distinguish themselves, thanks to their adult characteristics. Only problem is, I still can't identify one of them. I'm assuming it's some sort of prickly pear cactus because of the "flatter" shape it is taking, but am not 100%. The types of cacti that were included in the seed pack are Saguaro, Hedgehog, Fishhook Barrel, Dollar Prickly Pear, Desert Prickly Pear, Christmas Cholla, Cane Cholla, Santa Rita Pear, and Cardo'n. I've also included a picture of the cactus. Thanks for your help!

--Jordan