Herbig Haro Bowshocks and Cometary Globules, are not interpreted as Dark Matter Black Holes.
See below: micro bowshocks in the Carina nebula.
see also:
Cometary Globules are also supposed to harbor black holes as creators for Bok globules and HH objects.
or:
http://bigbang-entanglement.blogspot.nl/2015/05/bok-nebula-eso-9934-ir-image-with.html
Many of the butterfly (bipolar) nebula have their long axes aligned along the plane of our galaxy.
So; The dual Galaxy Anchor Black Holes (GABHs) responsible for the galaxy magnetic field (and the Higgs field polarisation) are expected to be the origin, according to Quantum FFF Theory. see
" Alignment of the Angular Momentum Vectors of Planetary
Nebulae in the Galactic Bulge" by B.Rees and A.A.Zijlstra.