In the age of sail, a marlinespike had many uses - as a lever to open strands of rope for the purpose of splicing, to untie difficult knots under tension, to add tension to freshly tied knots, and even as an improvised weapon against hostile boarding parties.
The tool has stood the test of time, and is still used by modern day sailors - including on the GHHS boats.
This particular marlinespike (though functional in a pinch) is meant for more decorative purposes and would be more suited for a mantle, or to be used for opening mail.
100% real swordfish bill. Fancy work handle made from hand-tied traditional tarred jute twine.