So I have a large brood box with 2 medium super almost full of honey. I always check the two supers when I take the top off but have always been afraid to take apart the brood box since I am a new beekeeper. I finally took apart the brood box today and found a bunch of large sells that when cracked open were white puss. I later learned it was larvae coming out of them and the bees were taking the larvae out of the hive. The larvae was all white with a black head. What is this larvae? How do I get rid of it? Thanks for the help in advance.