Herbig Haro dual Black Hole merger system forming two bowshocks as two GABHs Galaxy Anchor Black Holes and Cygnus A Galaxy.in the center.
Both curled yellow arms are the remnants of two self propelled Tadpole Black holes splitting after meeting leaving a plasma bar and pushed by two opposing jets into the bowshock location. (Q-FFF Model)
However, Not all galaxies are the result of ne or more standard Herbig Haro systems, like NGC 1277 , which seems to have only one super massive central Black Hole.
How can? see below my suggestion on the largest supermassive Black Hole coming out of the Big Bang, connected to the Anton Petrov video. on NGC 1277.: