Found a new LFS and found an Arrow Crab for 7 bucks. I have a large bristle worm pop in 100gal reef tank. After 2hr acclimation I introduced the crab to the tank. He picked at some LR for 15min or so, then climbed on top of a Zoo colony. He immediately started probing around, then started tugging at what I thought was a zoo polyp. Thought maybe I got the crab from hell. Then after 30 sec. or so I realized he had a 2 inch bristle worm in his claws. Couldn't believe how quickly he was going about normal habits and doing exactly what I wanted it to do. "Love it when a plan comes together".