What are these black, almost charcoal looking, algae?

[anemonemdd]

My tank is relatively new (3 months). I was told by someone that this might be dinoflagellate, but it doesn't look like it when I tried to look at some images on Google how do i get rid of it? It grows exponentially. I removed most of them yesterday, yet it has grown so much again

 

[Waters]

Looks like black cyano. Your tank is young.....right now you have a bacterial imbalance....it should work itself out. Check nutrient and flow levels as cyano thrives in high nutrient, low flow tanks. If you want you can try chemiclean but at this point I would just let it be.