Yamamoto Senko Worm, 5" 10pk, Purple Butter & Jelly Laminate | Purple Butter & Jelly Laminate | 5" | Tested and proven on California lunkers, Gary Yamamoto's Senko has quickly become a sensation throughout the United States. The Senko's salt impregnated, has a healthy profile, casts like a bullet, and features a unique smooth-and-even horizontal fall when fished weightless or wacky style. It's not magic, but it's pretty darn close.