Fish Skull Fish Mask, Ultra lightweight Fish Skull Fish masks are designed for tying weightless streamers that suspend in the water column. They have a realistic baitfish head profile that includes recessed eye sockets that secure and protect the fish eyes. Molded from a crystal–clear, fluro–epoxy polymer, the Fish Mask takes on the colors of the body materials being used on the fly. In clear. Head sizes refer to the hook size the mask will be used on. Please specify size.