Hi mama! Visible coronal sutures at 11 months can be normal, but it really depends on how prominent they are, some babies' sutures are just naturally more visible than others, lalo na kung ang baby mo ay matangos ang ulo. Pero since this is your first time and you want to be sure, better to mention it to your pedia sa next check-up lang para ma-assess niya in person, kasi siya ang makakasabi kung normal lang or if there's anything to monitor. A few of us mums in our group always ask our doctor about these kinds of things at wellness visits, and walang mapapangsalang sa peace of mind mo, no? You're doing great noticing these details!