frozenfish

I use sourdough discard on bread slices, instead of yogurt for my white worm culture. It works great, I'd say its equal to yogurt but free

From all of my research blackworm sexual reproduction is extremely rare, only documented in the wild seldomly and never in a cultured setting. To me those ovals look like daphnia molts? How long have you had these worms? If you do have sexually reproducing blackworms, document everything.