  We review briefly a few topics concerning physics of fluids whose
constituents are massless fermions interacting in chiral invariant way.
Macroscopic manifestations of the chral anomaly is one of central issues.
Another topic is ultraviolet vs infrared sensistivity of chiral magnetic and
vortical effects. To clarify dynamical issues involved we rely mostly on a
(well-known) toy model of pionic superfluidity.
