obvioulsy you've never planted a seed in your life, any seed. Thats ur seedling bro, just give it 2 days and they will turn green that split will be your seedlings first leaves that will advetually fall off. dont touch it! if u planted it right it didnt go anywhere, it just grew out of the soil. It doesnt seem like u know what ur doing so im going to advise you to read alot of these forums and figure out how ur gonna grow, becuase honestly, ppl dont normally respond to "Lazy" posts just a heads up, goodluck, also u planted ur seeds way to close to eachother and in soil ur not gonna be able to repot them, so take the chance now and move one of them, be careful! try and dig around it and dig it up, it has no roots yet or very very little. You want to use small pots one seed in each, and this way u can move them to bigger ones if needed. worst thing is if your girls get into a root fight for nutes, will kill them.