Over ten million fish caught every year on Rusty's - join the catching club and catch your share.  As this bait ages and matures, it will form a brown liquid shad oil in the bag, and a stronger fish smell.  This is natural, and in no way hurts the bait.  The more age on the bait the better it catches fish.  Needs no refrigeration.  For a deadly combination, when fishing for catfish dip baby shad in Rusty's Sponge Bait.