  We have recently shown that the ground state of ${\cal N} = 4$,
SU($N_{\rm{\tiny c}}$) super Yang--Mills coupled to $N_{\rm{\tiny f}} \ll
N_{\rm{\tiny c}}$ flavors, in the presence of non-zero isospin and R-symmetry
charges, is a supersymmetric, superfluid, color superconductor. The holographic
description consists of $N_{\rm{\tiny f}}$ D7-brane probes in
AdS$_5\times$S$^5$ with electric and instantonic fields on their worldvolume.
These correspond to fundamental strings and D3-branes dissolved on the
D7-branes, respectively. Here we use this description to determine the spectrum
of mesonic excitations. As expected for a charged superfluid we find
non-relativistic, massless Goldstone modes. We also find extra ungapped modes
that are not associated to the breaking of any global symmetries but to the
supersymmetric nature of the ground state. If the quark mass is much smaller
than the scale of spontaneous symmetry breaking a pseudo-Goldstone boson is
also present. We highlight some new features that appear only for $N_{\rm{\tiny
f}}> 2$. We show that, in the generic case of unequal R-symmetry charges, the
dissolved strings and D3-branes blow up into a D5-brane supertube stretched
between the D7-branes.
