When Black holes collide do they create dark matter again?

In discussing the creation of galaxies I was informed that Galaxies are created by a race of beings resident originally in Dark matter and Dark Fluid. My question might be from what I have learned so far is: "When Black holes collide does this create dark matter and dark fluid once again?"

If so, this might prove what I was told originally about how Galaxies were created. And since they were created they eventually return to dark matter and dark fluid. And Colliding Black holes we might be observing parts of our galaxy or others returning to Dark matter or Dark fluid because 96% of the universe is dark matter or dark fluid to begin with.

Matter and everything else observable so far is only 4% of the entire universe.

Therefore, since the primary resident of the universe is Dark Matter and Dark Fluid then that must be it's primary state while matter is a state similar to water going over a waterfall here on earth which means it is a very rare state similar to water going over a waterfall or waves crashing at the beach of an ocean, relatively speaking.