Our original plan was to dive one spot on the way out, then dive K Tower to try to kill some of the cobia that have been reported out there. Well, as the grunts say, no plan survives first contact intact. Our first dive was on a spot in 60 fsw that neither of us had dove before. Vis was about 20 feet on the bottom, water temp was "warm" (forgot to look at my thermometer).
We didn't kill much, but we loved the scenery so much we decided to forego K Tower and dive it again. Of course, it could have had something to do with the 70-80 lb gag I saw, and the 30-40 lb gag Joe saw.
When I first saw him, I thought he was a jewfish, since we saw a big one when we first dropped. Needless to say, I wasn't aiming for him when he turned his square tail and swam off. OMG! I burned over 1000 psi trying to follow him, but he didn't get that big by being stupid. I saw a few more nice (24-26") gags on the way back to the boat, but I was already shaken. I have a quest now.
Joe and I had split up once we hit the bottom, but when we got back to the boat we exchanged fish stories. We agreed that we wanted to stay at the same spot, in hope of finding those guys again.
We pulled the boat up closer to where we saw the grouper before our second dive. As soon as we hit the bottom we split up, me heading upcurrent towards where mine had headed off to. On the way, I spotted a keeper gag showing me his profile about 20 feet away. Since I've been practicing freeshafting, I decided to take a shot. I hit about 3" too far back behind his head, no kill shot. It was fun to chase him though, we played hide-and-seek through some rocks and ledges before I finally cornered him.
Not 2 minutes after I'd reloaded, a nice 30"+ gag presented himself almost as nicely, but an even longer shot. I managed to get the spear into him, but he got up under a big ledge (big depth-wise, only about 16-18" tall), and shook the shaft out. I hadn't had time to reload with my spare shaft, so there wasn't anything I could do as he came barreling by me. It took forever to recover my shaft, but I managed to get it out from under the ledge.
I hunted the big guy a bit longer, but didn't see him. I finally gave up and headed back to the boat. By this time the current had finished changing directions and I had a long swim ahead of me. I ended up having to finish it with a surface swim.
Joe saved enough air to be able to go back down and free the anchor before we left, and his big gag showed back up again, while he was down there without his gun.
I'm not posting any details about this spot, because Joe and I have a quest now. Grouper don't tend to move around that much, so we're going back. Any details I may have posted about the location itself may or may not be true.

At the end of the day, our only complaint was that we wished we'd taken more tanks. We didn't kill many fish (a couple of gags, hogs, and sheepshead), but we had more fun than I've had on just about any dive. That huge gag will be haunting my dreams for a while. If he's still there next time, I'll have 60" of spring steel with his name written all over it.