  We theoretically investigate the generation of the vortex dipoles in
superfluid Fermi gas in the BCS limit. The vortex dipoles are generated in
superfluid either by moving an obstacle above a critical speed or due to the
decay of the shock waves obtained on the sudden mixing of two superfluid
fragments. We observe that in pancake-shaped traps, the shock waves can lead to
the formation of density ripples, which decay into vortex dipoles due to the
onset of snake instability.
