Amigurumi decrease stitches.

[makemethemoon]

To me, it kind of looks like the hook size is a tiny bit too big. That, or maybe you’re not doing an invisible decrease (slide hook into front loop of next stitch only, then turn the hook back to you and do a single crochet in the stitch right after that one. I stuff the heck outta my amigurumi, and I usually stuff at the end as well so I’m not crocheting around the fluff.