Any idea what this could be ?

I have a baby beardie and I just noticed his left side of his stomach is hard and also almost feels like bones are poking out. It’s very strange and I’m not sure exactly how to explain it. He doesn’t seem to care at all when I touch it, he is eating great and pooping regularly and all his poop is normal. No black beard ever and just overall a very healthy normal dragon aside from this. I don’t understand at all. Has anyone experienced this? You can kind of even see it poking out in the pic