Was your Spyderco folder -- the one you used to clean fish -- the Catcherman??Or just an Endura or something?
God, I'd hate to have to clean an Endura -- especially a pinned model -- after cleaning a fish with it.
Come to think of it, was/is the Catcherman made with screw-together construction?
I used to have a Tekna Boot Knife in stainless steel, and it was a stout, sturdy knife. Didn't take a real sharp edge (it was VERY thick) but still was a good knife to have strapped on in the surf. Unfortunately, the surf is what caused me to lose it. I probably will never get a replacement for it.
I just use what I happen to have in my car at the time. It could be an Endura, Delica or even a Centofante III. The last one has pinned construction so it is more difficult to clean after using it. The Endura makes short job of even the biggest fish (keep in mind we don't do blue water hunting here... so what I call BIG is probably not that big for you).
The main problem with diving knives while spear fishing is that you need a stout tool that lets you finish off fish even puncturing their skull but at the same time you need razor sharp edges so you can free yourself from fishing net, line, ropes or whatever if you get trapped. When you go scuba diving you don't really have a tremendous urge to free yourself, there is no worry, you won't die if it takes a minute or so to cut everything. When you rely on your lungs you can't take second chances. You either cut it in a split second... or you will never cut it.
Just a few pictures.
I was 15 at the time... ¡and it was February!
Hope you like them.
Mikel
Mikel