I dove PCB a few years ago. Took a boat out to the old bridge spans that were sunk to create artificial reefs. There wasn't a huge amount of wildlife, quite a few spiny lobsters and some really swift currents, but fun nonetheless. If I remember correctly, some people were spear fishing, which was interesting to me. I had never been on a dive where people fished. I gave up deep-sea fishing to go down and actually swim with the fishes.
The visibility was quite low, my advice would be to check conditions before booking a trip. Have fun!