Made of super-soft plastic, the Berkley Gulp! Alive! Spinner Crawler is a nightcrawler bait that's infused with Gulp! Alive! scent attractant and specially made for trolling with a spinner harness. Strategically positioned bends and paddle tail add tempting movements as it glides through the water. Gulp! Alive! scent boosts the attraction and the realistic texture keeps fish locked on after they bite. Gulp! Alive! baits are 100% biodegradable.