Grayling Nymph Special V1. Yellow olive jig nymph variant perfect for grayling (tied on standard hooks with a slotted jig tungsten bead). Great fly for grayling but trout will not refuse either. Barbless with a tungsten bead. Nymphs tied on a classic hook are usually one size smaller compared to jig nymph fly hooks (ie. pictured fly is size 16 which is comparable to size 18 jig style).