The only place I can think of this being really worth the money is on fry tanks to avert the possibility of sudden fright syndrome that can affect the exposed spinal chords as the myelin sheath develops... funny enough, the first search on google points to a post I made a while ago about this in bangaii cardinals..
viewtopic.php?f=5&t=40967
other than that, it seems an expensive excercise to undertake for a effect, and little real benifit.
But having said that, whatever floats your boat...