Yep.

[The matter that we can see is, at most, 10 percent of the critical density. And, even if inflation is not correct and we do indeed live in an "open universe," there's still a lot of unseen matter out there. This unseen matter, called dark matter because it does not reflect light, keeps spiral galaxies from flying apart and moves galaxy clusters and even superclusters in a great path across space.

Baryonic Dark Matter
Particle physicists and astrophysicists continue to speculate on the nature of dark matter. Some dark matter may simply be ordinary, or "baryonic" matter made of protons, neutrons and electrons that fails to emit radiation detectable on Earth.]

More here: "a href="http://archive.ncsa.uiuc.edu/Cyberia/Cosmos/MoreMeetsEye.html">http://archive.ncsa.uiuc.edu/Cyberia/Cosmos/MoreMeetsEye.html

Also:

[And there must be some non-baryonic dark matter to account for the remaining 95% of the matter required to give omega, the mass of the Universe, in units of critical mass, equal to unity.

For those who distrust the conventional Big Bang models, and don't want to rely upon fancy cosmology to derive the presence of dark matter, there are other more direct means. It has been observed in clusters of galaxies that the motion of galaxies within a cluster suggests that they are bound by a total gravitational force due to about 5-10 times as much matter as can be accounted for from luminous matter in said galaxies.]

From: http://math.ucr.edu/home/baez/physics/Relativity/GR/dark_matter.html

Could be a 'connection' here (although it could be just a residual force when these galaxies where first formed -one of the thoughts that came to mind): Galaxies Like Necklace Beads.

(Yum :)