I snorkled out to the first reef line about 9:00pm and might have stayed out 45 minutes to an hour... Marvel watched from the beach and will probably know for sure. Down to the pier and back I saw a large ray, scorpion being cleaned by a clown shrimp, an eel, a large snook that didn't flea for some reason, and followed a turtle around for about 20 minutes. Nights are the best this time of year!!!
Days are so-so as far as critters go, though you never know. Three things seem to be happening:
First, the water is much warmer during summer, and as a result fish that like cooler water have headed NORTH. Fish that like warm water have headed OUT.
Second, the pier has been closed since last October and the fish have "forgotten" all the free chumming they used to get. As a result, bait fish make their living "anywhere" and I think that the absence of large nurse sharks may be due to the lack of chum-chunks that used to coat the bottom within a few hundred feet of the pier (nurse sharks probably fed on the chum as well as all the little sand-critters that did so as well). The large barracuda and tarpin are pretty much absent, though last night's snook was a good size.
Finally, Summer visibility doesn't seem to be as good as Spring & Fall, when the reef was often like a swimming pool. We have maybe 45-50 feet now, which is still plenty but not enough to catch every critter nearby.
I've leared something doing a lot of snorkling lately, though - there's a lot of life at the surface, and the "topside" view will let you see things that you'd otherwise miss on the bottom(improves your "field of view"). Of course, you miss a lot from topside, too, if you don't kick down a lot. Still, with tanks on, lifting my head every minute to look AROUND and UP pays.