Might want to marinate them shrimpies in some "flavorings" ..... garlic, anise, strawberry jello mix, or any number of attractants you have in your arsenal.

You might also consider using .... chicken skin, Spam, cheap Hot Dogs, or leftover French Fries, as the grease/fats in these foods are going to draw attention (added attractants optional). Beef Melt (pancreas) is also a good bait, but it's bloody to deal with ... and once the blood has drained out of the chunk on your hook, all you're left with is gristle.