The Gulp! Killer Crawler is more durable than a live night crawler and is deadly when fished finesse style or wacky rigged. Hollow core increases lifelike feel and incredible action. This bait performs exceptionally well on Mustad's slow death hook. Berkley Gulp! baits are made from natural ingredients and release 400x more scent than regular plastic baits. Gulp! baits are 100% biodegradable.