Ethnographic folding knives

[Berkley]

kronckew,
That knife is an interesting variation, since its tail does indeed appear to be in the form of tweezers such as are commonly used for holding sticky balls of uncooked opium. Most of the "fish knives" I have seen have solid spikes more suitable for knotwork on lines or nets (or cleaning hooves). The basic Chinese folder design appears to have a variety of possible uses.
Berk