  We show that topological superfluid strings/vortices with flux tubes exist in
the color-flavor locked (CFL) phase of color superconductors. Using a
Ginzburg-Landau free energy we find the configurations of these strings. These
strings can form during the transition from the normal phase to the CFL phase
at the core of very dense stars. We discuss an interesting scenario for a
network of strings and its evolution at the core of dense stars.
