My money would still be on the shark / alligator...
Perhaps you misunderstood. The knife is to cut them up after I put a couple of twelve gauge rounds in them from my Mossey 500.
My money would still be on the shark / alligator...
https://www.spyderco.com/catalog/details/FB04BB/Street-Bowie-trade-FRN-Kraton-Black-Blade/129
5" blade, less than 4 ounces
https://www.spyderco.com/catalog/details/FB39G/Sustain-trade-G-10-Black/1019
6.19" blade, 7.3 oz
Any time "defense" comes into play, it changes things dramatically. A knife good for utility, nice belly, wear resistant steel, thin grind isn't neccesarily good for defense. The design can come down to specifics of your training, strong side slashes and stabs, PMA's angles and grips, or something more limited. Personally a couple PMA classes, and a few years of BJJ point me to something small and secure as a weak side backup to a handgun. I prefer Karambits for the control, secure grip, and their inherent compliment to grappling. For daily EDC, folders are a lot easier to deal with in a 3-4" blade, 2-4oz. Fixed blades make sense around 5", the Benchmade Bushcraft series is awesome for a nice utility knife, eese, morakniv and Tops makes some good stuff that will work for a variety of tasks depending on budget.
This is what I use when kayaking in FL in shark and alligator country. It is 113/4 long, weighs 12 oz and is tempered and coated to withstand just about anything.
Yuuuup, and look for a company that sells training versions of their defensive knives so that you can drill/train with them. While knives are awesome for giving relatively unskilled people the means to be lethal, even a little bit of training will help fix what you don't know you need to fix. And of course, the best knife defense advice ever, ever....
LOL, but true, and this is one of the better training knives we used in class. In the hands of a skilled instructor, takes about 5 seconds before someone looks like they passed out at a frat party. metal trainig knives can be dangerous if you fall on one, most use markers or soft rubber.
That or one of them fancy zap-knives