I've been out there when the vis was pretty good (30'), and seen several schools of fish (and Walter and I came across some ornamentals once), not to mention the crabs, mantis shrimp, and other inverts there as well. They mostly are out in the 18' water (a bit beyond where we commonly go for teeth), where there are some corals (gargonians, mostly) and sponges... a miniature reef. This is what I've considered for a night dive here. I don't think it'd quite be the keys, but I do think that there would be some things of interest to see. On the other hand, like Wildbill, have heard of the sharks they pull up off the pier.