Gotta tire big fish out more on the yak than when fishing from my boat, that's for sure! I keep a small club with me. Once I stun them I pull out the knife to brain-and-bleed them.That's a goal of mine...We have to knock them out once they get on board (see the mini bat, we have since moved up to my unc's wood Louisville slugger from the 70s) - can't imagine in a kayak...here for it though!
The cobia I lost was from billowing braid getting tangled on rigging on the deck, not from alongside. But now you have me thinking about the end-game if I happen to tangle with one the size in your photo.
I considered a short-handled flying gaff but besides cobia the only fish I regularly target large enough to warrant it would be stripers, and now that they narrowed the slot (28-31 vs. 28-37.9) and outlawed gaffing stripers doesn't seem worth the hassle of carrying extra gear.