I notice that some manufacturers of nymph or wet fly hooks design them with 'up' eyes (Orvis, Tiemco, etc), instead of the 'down' eye typical of dry fly hooks. Atlantic salmon flies are traditionally tied on up eye hooks (from Partridge, Alec Jackson and others).
What is the advantage, if any, to an up eye hook for a subsurface fly? Thanks, Kent Lufkin
