  We show that relativistic magnetohydrodynamics (MHD) can be recast as a novel
theory of superfluidity. This new theory formulates MHD just in terms of
conservation equations, including dissipative effects, by introducing
appropriate variables such as a magnetic scalar potential, and providing
necessary and sufficient conditions to obtain equilibrium configurations. We
show that this scalar potential can be interpreted as a Goldstone mode
originating from the spontaneous breaking of a one-form symmetry, and present
the most generic constitutive relations at one derivative order for a
parity-preserving plasma in this new superfluid formulation.
