Abnormal poo?

Abel has been his usual smiley happy self and in fact, naps alot better. However, since yesterday, he's been pooing more often and there are black seedy particles in his poo. Haven't seen it before for Keziah nor for him till now. A concern since breastfed baby's poo is not suppose to be such. The colour is right but not the black particles. It's as if he's eaten dragonfruit which I didn't eat either. Where did all the black stuff come from? Can someone tell me if it's still normal?

Sorry I know this shot may not go down well especially if you are having your meal.