I like to try all different kinds of fishing, from different species to different techniques.
Spearing a fish from a moving boat is not on my list of fishing to attempt.
The foremost reason is that I would end up falling out of the boat. Another reason is that any fish in the waters where I live that would be close enough to spear, I couldn’t hit anyway.
That’s not a problem in French Polynesia, where Oliver Emsallem speared mahi mahi from a moving boat.
I’d probably end up spearing myself.