Fish rivers and lakes with this all-purpose, highly effective nymph. The Prince Nymph is particularly good on rivers with hatches of black caddis. The gold bead on the head adds weight to help the fly sink faster, and the color attracts the attention of trout. Each has peacock herl on the body. Per 12. Sizes: 12, 14, 16. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Fly Assortments.