Vexan Ninja Frog Baits For Bass Fishing. The Vexan Ninja Frog is the most durable hollow flexible frog on the market. The Popper versions all made with OWNER Black Chrome Frog Hooks. Every Ninja Frogs comes with extra long skirts too so you can cut them shorter for your fishing needs. No expense was spared on these quality frog baits for your bass fishing needs.