Had the same surprise a couple months ago before I bought my kayak. Fishing on my Seadoo chasing the crashing birds on the outside, I sent my jig right into the mele and hooked up solid...Based the tail beat on the rod I was hoping maybe another 50+ lb YT like Larry caught a while back. Real long and slow beats. Fought it for an hour+ and finally this GIANT Batray surfaces with my jig in the very end of his wing tip (thus the long slow "tail beat"). Took me another 15 minutes just to get the jig out. His stinger looked about 6 inches long and flying all over the place, stinging at my jig, scratching the crap out of my Seadoo and coming waaay too close to my leg not to mention my hand and pliers trying to get in sync with his tail.....By the end of that fiasco the action had stopped.....Aaarrrgghh!
Wonder if they really taste like scallops