Is this baby diarrhoea?

Hi all, my 5M+ LO has been pooping more than usual at 3-4 times a day. He usually poop once max. Poop looks a bit watery (per pic). He has been drinking much more than usual about 200ml more, likely due to growth spurt. No fever, still very active and happy. Other than the more frequent poop, we are not sure whether this is diarrhoea? Any advice and whether we should visit doc. Thanks. #firsttimemom