. Berkley Gulp!/Gulp! Saltwater Rebate - $5.00 Cash Back Purchase any two bags of Gulp! OR Gulp! Saltwater between February 1, 2018 - August 14, 2018 and receive a rebate check for $5.00 Valid From February 1, 2018 - August 14, 2018 View Details The BERKELY Gulp!Saltwater Shrimp has 400 times more scent dispersion than ordinary plastic bait. The extreme scent dispersion greatly expands the strike zone allowing you to catch more fish! Even more impressive, the natural and biodegradable formula outfishes live bait in head to head field tests. Berkley Gulp!Saltwater truly is the next generation in soft bait! Looks, feels and smells like live shrimp! Rig and fish using any technique appropriate for live shrimp. Extremely durable and long lasting.