

I’ve grown a few eggplant varieties and I’ve never seen this. The seeds are much larger from my experience. Perhaps these are under developed seeds, I’m not sure. I’d say provide more images. Like has been mentioned get a single slice cross cut. I’d wager that it’s possibly a reaction to the knife. So try and rip a few pieces and see if it’s still there. I doubt it’s mold or any sort of fungal infection. Unless the outside looks weird.
All the seeds I’ve seen are bigger. In the varieties I’ve grown they are white if I recall correctly. The two varieties I’ve grown are Black Beauty and Ichiban, if that helps.