The first Galaxies seem to be based on Massive Dark Matter Blobs or black holes, reason to support the Dark Matter Black Hole splitting Big Bang, leading to the Cosmic Filament Web, created by travelling splitted Big Bang Black Holes called Tadpoles, driven by Plasma tails which are steered by the local massive Gravity attraction forces.
Splitting Dark Matter String Black Hole Big Bang into Star Clusters or Dual Spiral Galaxies.