This is where divers come in. In order to defend the other fish and try to control the population, countless divers are spending their precious time underwater to hunt for lionfish. The tool of the trade is the pole spear - a shaft with 3 long points on one end and an elastic band on the other to provide propulsion.
Zac is spending the next 6 weeks working a commercial diving job in the Bahamas, and Kate is going to spend most of her time freediving and hunting for these deliciously dangerous fish. We didn't have any spears of our own, so Zac decided to make a few to take along.
- 22" carbon fibre crossbow bolts
- removable steel arrow heads with solid points
- 1/8" stainless steel rod (12"x 3 per spear)
- 1/8" stainless steel eye-bolts
- 2 part epoxy
- surgical tubing
- 1/4" threaded rod (1" per spear)
- electrical tape
- sand paper
- die grinder
- center punch
- bench grinder
- drill press
- drill bits
- vice grips
So I started by grinding the points off of the arrow heads to give myself a flat working surface to drill three holes to hold the spear points in position. I made 3 indents to drill the pilot holes, then drilled each to a depth of 3/8" with a drill press. You can see the 3 stages of the arrow heads in this photo.
I needed a way to attach the surgical tubing to provide the force, so I drilled out the plastic string-notch in the back of the bolt and installed the eye-bolts. I used the epoxy as a sealant and to provide extra strength. The nut that is holding the eye in place had to be ground down to fit inside of the hollow shaft. All I had to do then was make a 4" diameter loop of surgical tubing run through this eye and we're done! So I didn't have to tie a knot in the tubing, I stuck a 1" piece of threaded rod inside the hollow tubing and secured it with electrical tape. Done!