Welcome slimshady!
Looks like what everyone thinks, Nerite eggs.
Also if you need some additional tank info there is a great article linked in my signature here. It will be a huge help and resource you can use and check back on.
If you are interested, if you're not sorry to bother you about it. If you cut back your lights on time, you might be able to reduce some algae. Sometimes increasing water change schedules can help too.